Me personally? I just get sick of intellectually lazy people. If you're not willing to be conscious and face the facts of the universe, then you're not really being a person. In addition, religious people often want others to be forced to live by their views, such as putting the Ten Commandments in the courtroom and creating other laws based on their 'faith'. If that's your thing, go live somewhere else. This is not the place for it.
I've also seen the evil that religion can drive people to. When I see evil, I speak out against it. I assume this to be my duty, but I'm not sure why. I want the most good for the most people. Religion alienates people and turns them against each other, has throughout history.
As for politicians, I think that they have to lie about 'faith' in order to get elected. It really makes me angry because it's such blatantly pandering horseshit. Even Democrats do it.
But I'm not trying to run for any office. In order to do that, I would have to subjugate my own philosophy. It's simply not for sale.