It's not hard, it just requires compartmentalization. This is a skill that can be learned like any other, and brings rewards in many aspects of life. Give it a try.

And if you tune out the media and talk to ordinary Republicans and Democrats you'll usually find that there are few fundamental divides and that they mostly agree on the main points of political and economic philosophy. It's like Catholics and Protestants arguing over the fine points of Christian theology; those might seem important to fanatics but if you take a step back and look at the disputes from the perspective of, let's say, a Buddhist the differences seem trivial.