Christianity is not a homogenous group, of course. Actively spreading the word is only part of some of the churches. I do agree it's a very obnoxious part of any religion. And unfortunately it's a winning strategy. The actively spreading branches of any religion tend to actually be able to gain more believers by their missionary practice, so the "telling people what to believe" continues with no change in sight.

Really I prefer the word secular for myself, and for me that means I am comfortable within my own ignorance. Scientifically, we can neither prove nor disprove the existence of a god/gods, afterlife, etc. They are unfalsifiable, and therefore inproveable either way. So I just say I am comfortable not knowing. I neither assert the existence of god or the nonexistence of god, because I have no way to know either is true. That, and as I stated previously I just don't like some of the connotations aetheism has gotten. Long ago I used to be a very loud, annoying, self-proclaimed atheist. But eventually I realized that just as there is no way to prove theism, there is no way to prove atheism. That, and I recognized that in my efforts to "spread" atheism and debunk religion I'd basically become what I was originally trying to "fight against," essentially. Now I should be clear that I very much do still massively criticize those who try to exercise their religion onto others. I'm trans so I'm very used to it at this point. But I know plenty of religious people from all kinds of different religious backgrounds who practice in a way that is accepting of all people and does not impact those who do not share their faith, and I really see no problem with that.