There is no comparison. I wasn't making a comparison. Just asking the question of whether they do or not. Pretty organized group of non-believers (or whatever you call organized atheists).
Did you know they have atheist churches?
didn't know that but I would guess that the vast majority of people who identify as atheist don't belong to any church and don't feel compelled in any way to convince someone to become an atheist
christians (and other religions) have a mandate to spread the word, evangelize, convert etc..
Are there organized atheist groups who travel the world going on mission trips, trying to convert the natives, etc..
I'm not aware of any but perhaps you know of some