Friends and politics

Yesterday the coffee shop became a battleground as two of my friends (we'll call them "A" and "B") fought about politics. One friend I agree with (A), the other I don't (B). But the one that I don't agree with (B) will never be changed by arguing, so I've never fought with him about his views. But yesterday "A" did go at him pretty hard. I'm not sure why. I don't think "A" thought he could change "B". I think "A" was just tired of being stereotyped by a generational bias that says that all conservatives are rich, money-grubbing SOB's (to put it in "B's" terms). It was pretty heated for about 20 minutes as "B" began yelling at "A". It was disturbing for me because "B" has been someone I've worked hard to be friends with for over a year. He's been family to our family, in spite of our differences.
Then, this morning, "B" told me that we could no longer be friends because I have such conservative friends. "B" informed me that he would no longer be bothering me with his boring liberal rhetoric. He then slammed his truck door in my face and drove away.
Sad day. Sad day, indeed.