Code is like science. You don't ignore somebody's contribution just because you don't agree with their values. If it's good it's good. Doesn't matter who birthed it.
Wait, so someone's code can be bad because he is a bad person? Even though if you didn't know he is a bad person his code would be just as good as written by good person?
Sure, it's a value judgement. But it's value judgement about the code not the author. It's just like science. We can't say: let's skip the whole rocket thing because it was invented by a commie and a nazi.
Also value judgement doesn't mean totally arbitrary judgement. If code doesn't work it's not good, if it's not maintainable, it's not good. There are qualities of good code that programmers tend to agree about. Being written by wonderful human being, is not one of those qualities.