I guess from my perspective, anyone who tries to missionize is more religious than me, so when I get missionized by atheists, I see them as religious, whether they believe in "God" or not. To me, that's one point that makes the huge difference between being a "non theist" and being an "atheist".
Anything else that comes out of the mouth other than "I don't believe in god" has nothing to do with atheism.
A lot of people like to appropriate the word, and since most hardcore anti-theist atheists wear it on their sleeve, you only associate 'atheist' with the evangelical kind.
When you're thinking of the strong anti religious atheists you're really thinking about anti-theists.
As for atheists trying to convert people,
when it comes to crunch all religions are believed first and foremost because a) your parents did and b)it feels good to
Theres a reason every single major religion tries to explain 2 things. What happens after you die and where the universe comes from.
People are scared of death and confused by existence. For as long as humans have been able to imagine stories, isolated cultural groups have made up their own gods. You would have to be fucking retarded not to realize that. We've even got to a point where the majority of the invented gods of the past are no longer believed in, yet we got fuckers STILL thinking the most recent ones are not the same as all the others, even though they all largely share the same "proofs"
An old ass book saying things that contradict all the other old ass books written by humans and a bunch of pseudo miracles like 'saving' people from cancer. Except that its admitted god would never actually do anything because if he did prove himself then you wouldn't have to believe, so the fact that he isn't proving himself is proof he exists.
HINT - Theres a reason all the burning bushes, global floods, rivers turning into blood, god and angels coming to earth dried up about the same time humans started collecting reliable scientific documentation on the world.
The one big plus atheists and anti-theists have over theists is that I've never EVER heard an atheist tell people to settle with believing for believings sake, or ever discourage rational inquiry, which organized religion does by the fucking shitload. Atheists generally persuade people to think and provide reasons for their beliefs. Theists just tell you to shut up and swallow their bullshit instead of anyone elses.
Most theists are fucking pussies at defending their beliefs as well, a self protecting mechanism of the god meme. The amount of times I get told to "find god and i will believe", or that god is math and science, and science is real so god exists, or that it says in the bible god is everything, and everything exists so thats proof god exists.
Shit, even the most modern religions are still sick fucking trips.
Heaven and hell from the bat is some fucked up shit. NO ONE deserves infinite punishment for finite crimes. We don't punish the worst child rapist murderers a fraction as bad as Jehovah plans to punish thieves and homosexuals. Stoning kids for insulting their parents, killing villages of non believers, every man women and child except the virgin girls which you get to keep as sex slaves. Though I suppose its how you interpret it, since every fucking religionist chooses, interprets and invents any bullshit they want to back up the beliefs THEY want to believe.
Just people to scared or stupid to accept 'we don't know' as an answer, and too afraid to accept that the warm fuzzy feeling when they think the holy spirit is entering them is just that, a feeling. Shit, the fact so many religions either have god as a man or an animal you find on earth should be a huge fucking tip off.