I like almost anyone who isn't an asshole, regardless of religion or lack thereof.

For those atheists who are anti-theist (not all are) they are going to be most knowledgeably opposed to what they're most familiar with. Which, in most of the West, is going to be some form of Christianity.

I have also noted over the years I've participated in this and other sites, that there just aren't that many ex-Muslims (for example) or Muslim apologists that post, so the topic simply does not come up. I have seen them -- a few Muslims, and a Hare Krishna devotee once. But they're infrequent.

Also ... not all theists are proselytizing, or have a malfunction with people not agreeing with them, including atheists. This is more a feature of the Abrahamic "people of the book" -- Christians, Jews, Muslims. I doubt you'd have many Hindus or Buddhists or Taoists crusading against atheists. Hindus, because they're polytheist and not into "one true god" ideology, Buddhists and Taoists because they don't even have a deity as such.

You'll find all types here - some users are very, even vehemently, antitheist; others (including myself) find religions interesting and are not fundamentally opposed to them. We also have a variety of users from non-Christian backgrounds (again, myself included) and several from an academic background who have an awareness and deep understanding of different faiths. We are, as the saying goes, a broad church; I hope you'll find the site and community to your liking.