At my extremely liberal college, I was exposed to even more militant Atheism. It was there that I learned the mere whiff of religiosity is worthy of denigration. Many of the people I met approached religion with something between disdain and loathing, and considered all religious belief a form of fanaticism. Christians in particular were characterized as knuckle-dragging, mouth-breathing fundies (and that was in polite company.)
In this new environment, my Atheism was more than evidence of good reasoning, it was a socially desirable badge of intellectual superiority. Make no mistake: Atheists think they're smarter than you. Atheism isn't simple skepticism. It is a certainty that believers are wrong, and by extension, intellectually inferior. Religion, especially Judeo-Christian religion, is nothing more than a crutch for dupes.
But Atheists aren't content to leave religion as a mere object of ridicule. They want it cleansed from public life.