Politics and doing it

Is it right or wrong to not date someone because of their politics? On one hand, politics is about your core values, and what you think is important about living. On the other hand, there is not much any single dumbass like myself is going to do to change the whole system. Your politics are in effect, powerless, and so you are not really personally going to make widespread systemic changes. There is also a lot of commonground to be found that is not political. The love of reading, or mountain biking, or sailing, or even doing it can all be the central part of your lives together. I think though my final decision is that I can't marry a liberal because they're idiots who have the world all wrong. She'll probably ruin my children if she doesn't abort them first.