If you want to coexist happily with theists you have to live and let live.It's quite different opposing their beliefs on a site like this than openly trying to speak against the irrationality of their "faith"

Option 3 might be to realize the difference between a lie and an honest error. We’re talking about 80% of the world’s population here. We have more in common with them than we have at odds.

Unfortunately the choices are not that easy. Religion can more important than family to a lot of people. Also depending on where you live, being a non-believer could put your livelihood at risk.
Each of us has to decide what our own comfort level is while managing to stay sane and true to ourselves.

Truth can be a slippery subject. Everybody thinks of their own opinions as truth, but the actual truth might be out of reach. IMO it’s best not to call people liars. I would just say that my opinion is different, or that I think they are mistaken.

Neither option works for me.

You can do so by asking questions that expose the weirdness of belief. Which leads to Thought, and getting religo-bots to Think is 99% to "winning"

I don't see it as a binary choice between being a firebrand and coexistence.

I think we just don't have any real need to be controlling asshats, we live and let live, express and enforce healthy personal boundaries, and all that stuff takes care of itself.

I have friends who are believers or who have no very specific beliefs beyond some vague affirmation of a "higher power" and I see no purpose in constantly challenging them (or, really, in challenging them at all). Some people are pretty indifferent to god but at the same time don't want to think of themselves as unbelievers as that's uncomfortable and socially unacceptable. So I just let them be. And guess what, they return the favor.

The ONLY time I come out swinging is when I encounter, e.g., Christian fundamentalists who won't let me be, and want to lay guilt trips or obligations on me that I don't accept. But I've dealt with most of that by just not living in the Bible Belt or other conservative religious pockets. It's not a practical problem of daily life for me.