Somebody in the comments at Making Light is perpetrating the "if they disagree with me, they must be evil" idea...again, or still, what does it matter?
How can you believe your fellow human beings are evil on so little evidence as who they voted for in the last presidential election? It's beyond my understanding.
I get why people vote differently from me, and there are lots of reasons. We disagree about the facts--it is possible to completely disagree about the facts, because neither of us has first-hand knowledge of them (see, e.g., Israel). We interpret the facts differently (see, e.g., the run-up to, and reasons given for, the invasion of Iraq). We have different values (see, e.g., bootstrapping versus welfare). We think different things are most important (see, e.g., abortion and the Second Amendment). None of that makes them evil, not the way I think of evil anyway.
I do think it's evil to demonize the people who disagree with you by labeling them evil.