Part of the trouble with politics is that people usually tend to let their "party leader" decide for them how to feel about the issues. If we had more independent, open minded thinkers in this country, we'd all begin to understand that we have much more in common than we realize. The two-party system, by design, seperates people, rather than bringing them together. It's certainly a form of segregation, in spite of the fact that no one ever refers to it in that manner. There's actually an aisle that seperates the two parties during congressional meetings, very reminiscent of those lines/ropes that seperated the races in dance halls and on buses 50 years ago. When you intentionally seperate people, over time they will alienate themselves from one another (or in many cases demonize one another.) After a while, even if the ropes/lines/aisles are removed, the animosity, ignorance and bigotry remain.
It's perfectly healthy to be critical of the actions of a politician. It's not healthy, however, to condemn an entire group of people who voted for that particular politician. Nor is it constructive.