Would you object if your 30 year old son came to you and said that he had just become a missionary to Africa by signing up with the Soldiers For Christ (a fictional brand for illustration I hope!)
Since I lost the big V card 19 years ago, the fact my son invented time travel would be more impressive than him becoming a missionary.
Meh, his call and hopefully I'd done enough to teach him critical thinking and questioning it's not a totally harebrained scheme.
It's funny how many people who used to say my devotion and piety inspired them became atheists later. I wonder if it's contagious.
At thirty, that's their business. They would be an adult capable of making their own choices. I would be proud, because even though I may not agree with the ideology, it would be obvious that he has good intentions. I would also be excited that my child had the opportunity to travel to New places and learn about new cultures.
I would be profoundly sad and pity him for such a choice.
Object? Not really, it's his life and if he wishes to enter a delusional world of fantasy over facts, that is his choice. He may or may not recover from imaginary back to reality but life is terribly short and if he gathers a superior sense of holy servitude to an invisible sky daddy, for him, at this time, - - - if that's what he wants so be it.
Personally, I have a great deal of disdain for missionaries as they generally promote more societal damage then good.
Sorry for you loss.
First, his choice. Second. I personally got out of the act of analyzing/debating what religions believe. Its exhausting. My point is. If your son is doing positive things to legitimately help people thats great. To me beliefs and intentions are not indicators of quality. Its the actions of such persons. Trust me there are plenty of crabby free thinkers out there that can be even worse people
I would ask what exactly the Soldiers for Christ are doing in Africa...
I've been told that some types of missionaries are doing real good humanitarian work in these countries, like medical care and education..., in addition to their traditional business (trying to convert those folks...)
To be honest, I would encourage him to do so. I say this because doing things to help others is a good cause.
Myself, I volunteer at a homeless shelter. It's called Catholic Charities, so obviously it's a church run organization. But so what, Helping people is helping people.
And you never know. Just being around starving, suffering people in Africa, might just give him the push him into thinking twice about a 'Just' God.