I understand the difference. I see your intent of your argument. But that does not detract from the fact that modern day Atheists have made a religion out of ridicule and scorn aimed at believers in spiritual things. If you simply believe deities do not exist, you still have no cause to ridicule those that believe otherwise.
I agree. And it's true that some have turned their rejection of theism into a religious campaign. But any fixation can be turned into a religion. People have built religions around sex. But that didn't make sex itself is a religion, or everyone who's ever been laid a follower of the sex religion.
If you had evidence of non-existence, you might have a reason to argue with other religions. There is no proof either way that I am aware of. So the Atheist doctrine of opposing religion and any sign thereof has become a religion.
Again, some atheists may think that way. But there is no "atheist doctrine", any more than there's a single 'theist' doctrine. Come to think of it, that's probably a pretty good way to make my point. Theism isn't a religion either. It's just a belief in one or more gods. It takes more than one belief to make a religion.
I don't think that at all. Depending who is practicing it, and how, Bhuddism is arguably an atheistic, spiritual practice, even a religion. But the mere lack of a belief in god isn't inherently spiritual. I suppose you could posit a "mundane" belief in a god, that also lacked spirituality - but the term "faith" implies more. I
does depend on a spiritual component, and that aspect is missing from the lack of faith exhibited by an atheist.