Atheist Fundamentalists

I recently read a book in which the main character was an atheist. Generally speaking, I have no quarrels with atheists. I don't share their beliefs but so what. Generally speaking. This character however proselytizes atheism. The character seeks to convince his antagonist to convert. Make no mistake atheism is a religion too (if you consider religion to be a belief system) . I have known an atheist or two like this character (although most atheists I have known don't get into the "why" and "how" of their beliefs unless asked) and I enjoy a free and open discussion however these folks have anything but a free and open discussion. Fundamentalists of any ilk by definition feel that they have all the answers and it is their duty to get everyone else to adopt their beliefs. Fundamentalist atheists are no more welcome by me than Fundamentalist Christians or Muslims. Atheists get this absence of evidence is NOT evidence of absence ( the inability to prove God exists is not proof of God's nonexistence). Also atheism is a belief system as are other religions. Knock yourself out if that is what gets you through the night but understand the rest of need not buy in just to validate your faith.