I kindly encourage you evaluate your feelings about the matter. My Mom says "I know you're an atheist but god bless you I love you." Her beliefs don't impact my atheism at all. Nor does my atheism impact her. I understand and respect her right to believe whatever she wishes, even if I think her beliefs are a bunch of malarkey. It's not important to me that she know this opinion of mine. I love her and her feelings are more important than my desire that she know what I think on the matter. If she wishes to "god bless" me because it's imortant to her, shrug I say no-problemo and I remain casually unabashed. I only ask that you think about it for your own emotional well-being. Let go and let reason my friend.

My ego is not attached to my non-theism and so I'd be grateful that they're still here to talk to me and want to. Since 2000 I've lost my grandparents, my father, my grand aunt and last July my brother who was only 51 at the time. I'd give anything to be able to talk to them again even if they included religious sentiments in our conversations. One day and it could be soon, your parent's texts are going to go silent and you're going to discover quickly enough that your annoyance was petty at best.

Why don't you respond with some secular comments that are not too offending or condecending? eg. Enjoy this glorious day that nature has given us.

What difference does it make? They are probably doing the best they can. They will probably not change. If you are secure in what you believe, it should just roll of your back. Maybe if you just continue what you are doing, they will eventually realize that it isn't doing any good and back off. If you argue with them, or try to get them see your viewpoint, it will just give them an opening to push it. I'm sure they respect you, but like all fundies, they think they have a duty to try to save you. The best thing to do is grow a thick skin, and ignore it.

I'd just say hi.

There is a point where your respect for your parents needs to be reciprocated. I disagree with those telling you to ignore it; you don't need to be rude but, you do need to be assertive in telling them to respect you.

This would annoy me no matter who was doing it.

However I guess if it had been my parents I might have just put up with it.
But my parents never did that to me?

My Dad did once say "You're going to really want God when you are confronted with death.". He really sincerely believed it so I really didn't have an issue with him saying it.

They will probably quit after a while.

The phrase “have a blessed day” always burns my biscuits. I once had a mechanic say that to me as he bowed. Is it a southern thing or can it be found everywhere?

I would find that very draining. Difficult to make them cease without offending. I hope you find a solution.

I live in Oklahoma, and many customer service professionals say, "Thank you, and have a blessed day." I always say, "You, too." If they need to believe in an imaginary person to tell them how to be a moral member of society, so be it. I feel sorry for them that they are incapable of having morality with out it.

After explaining to them one last time that you are not a Christian, and that you don't appreciate those type of comments, then I would start replying with Bible quotes of your own. Try Ezekiel 23:20 or most of the book Song of Solomon.

When they tell you to have a blessed day respond with "Allah willing". or send this to them: “Allahumma salli ‘ala Muhammadin wa aali Muhammad (O Allah, send blessings upon Muhammad and the family of Muhammad).”

A simple good morning response is fine. I have religious friends who know what lane I'm in on this subject, so when they are start babbling or try to "God bless me" or whatever the hell, I just nod and smile as if dealing with a psychiatric patient.

Could you say something like, "Thanks for the warm wishes. I know I will have a great day regardless of any possible blessings. By the way, you DO know I don't believe in God, right? So you really should be passing those blessing wishes on to someone who might actually use them."

Don't you just hate being "worked on?" I know I do. I have a couple of friends who do this to me and I give them plenty of side eye.

If you want to change their behavior, simply ignore all texts that contain religion. If they ask why you didn't respond, just act surprised and say, vaguely, that you've busy, then change the subject, or wander out of the room.
Stay happy and busy, ignoring them unless they are behaving normally with you without referencing religion. Then give them positive reinforcement by smiling and looking at them, and/or responding positively to religion-free texts.

Another thing you could do is to text back. "I don't believe in god. Please cease such references with me," with each received religious text, without any further comment, then refuse to respond to their protests. Repeat this line each time they send such a text.

But it would be more effective to just ignore the religious texts in the first place. Act like your parents don't exist. Be busy and happy, forcing them to chase after you to get your attention.

I trained my own parents to stop accusing my kids every time I visited them, by saying "Look at the time! Gotta run! Love you!" and LEAVING every time they started attacking us when I visited them.
It only took about four times before my mom would start shushing my dad whenever he started accusing my kids.

at least your parents are gratefull for the creator who created the heavens and earth, and you feel disrespected ! your duty is to respect and Honor your parents no matter what they say or do., and you say ?

It should be a two way street. If they want to make religion taboo, neither of you talk about it. However, if they bring it up, you should be able to respond in kind. A "good morning, the sunrise is beautiful and didn't require a god to make it!' text might be warranted here.

Eh. every set of parents have their own forms of passive aggression. compared to what mine do this is a minor annoyance,

When you are at peace with where you are that should not bother you Sir!! Your parents love you and they have been conditioned to be like that , you are aware of that. Don’t let your ego get in the way my mother does the same thing that’s just her way. Nothing she wouldn’t do for me .

That's very difficult. But because it only started happening after you told them you were an atheist then it is a passive agressive move on their part. If it were me I would tell them that you respect their beliefs and you would appreciate it if they would respect yours. Tell them you love them and love to hear from them but they need to do it with respect. If you don't stop it now it will get worse and more difficult to stop later.

Do they send those greetings in an attempt to convert you or, simply, because that's the way they feel? If the first scenario is the case, tell them they are wasting their and your time; if if the 2nd... go in your merry way and don't say anything.

I would....

I think your response is nice and appropriate. I don't believe you are being "disrespected" per se. It's passive aggressive. But I hear ya. Do they KNOW you would not necessarily appreciate those words? If they do know, then they have a Boundaries problem. They're rubbing it in. It's hard for them But, you know, I wouldn't tell them to stop. Try to Just let it go. Do what you're doing. Maybe call them more often for some real conversation, beyond a routine text? Some years down the road when they're both gone, you might think, Oh! What I'd give right now to hear my parents greet me in the morning like they used to do.