How does one stay sane in a religious environment and/or family?

[Zenith]

So, this past weekend I went wit my family to visit my grandmother. Don't get me wrong, I care about my grandmother, but she really irritated me. She lives in North Carolina, and being an old southerner, is rather religious. I don't know if I just never noticed before or if she was more vocal this time, but she was rather prejudiced towards homosexuals, african-americans, and non-Christians. It was annoying the hell out of me, but I just kept my mouth shut and waited to go home. My father is no better. In fact, he's worse. Unfortunately, I live with my parents still and my father is currently taking online classes at Liberty University to get a Master's degree in some theological crap. I live in a highly religious community as well.

My point to all this is , is this: Who else feels overwhelmed by their religious surroundings? Usually, it's not too hard just to live your life, but sometimes all the crap just gets shoved down your throat. We atheists often criticize the religious for being bigoted, but sometimes they themselves make it exceedingly difficult not to hate them, and for family, not want to visit them. I'm aware that there are far more religous communities and families out there, so, How do you all deal with these sorts of situations?

Madness is all around. Anyway, unlike most people believe, I think all this is the majority-minority problem: If 90% of world population had been pentecostal, the rest 10% would either be forced to convert or persecuted (hated, despised, having less privileges, etc.) and others killed. If 90% of the world population would have been orthodox or catholic or islamic or atheist, I'm sure that the same would happen with the minority. Even in local groups (e.g. in a town, a neighborhood, or whatever) the majority feels itself superior and greater in number and such things happen inevitably. Even if a pentecostal spends a lot of time among lots of pentecostal people, while with atheists he has little interaction (like communication), and only a little time, he feels he's the majority, and acts accordingly.

I also can't stand hitler-kind religious people (i.e. those that try to convince people of their beliefs by using a loud voice, threatening, etc.), but such situations happen.
Now there are a few cases:
1. If he is of your family or someone you can't avoid and can't afford to be harsh to, it's better not to argue with him at all but say a kind of "yes, yes", "ok", "you're right", etc. It should sound as if you really agree or would think seriously about what he said.
2. If he is not of your family and can avoid him, you should avoid him.

• a. If he tries to talk with you and is disrespectful, or simply an idiot (perhaps most of the cases), you may be harsh in the meaning of letting him understand that you don't want to hear him.
  b. If he is respectful and seems to have something in his head (i.e. intelligence), perhaps a debate might occur and would not be frustrating. Only be aware that this latter case is very rare. In case of anything, you should not let him know where you live, or some means of contacting you, if you later try to avoid him.