I think we atheists should tolerate the religious not because their views are just as valid as ours, but because experience has shown that we are unlikely to convert them, and so we have to find some way to live in peace with them, even if we find their views false or otherwise objectionable.
One odd thing about the current debate between religious people and atheists is that the participants don't seem to care that they entirely fail to communicate with the other side. They therefore have no account of why the religious or the atheists believe what they do, except that they are stupid or deluded. I think philosophers should try and make sense of their disputes with their opponents as far as possible without treating them as idiots. This applies to the religious participants in the debate as much as to the atheists.
I'm not a militant atheist, just an atheist. In fact, in a largely atheist country like the UK I think it's a bit silly to be a militant atheist.
I had abandoned Catholicism, but even during my short militant atheist period I maintained an interest in western religious art and music.