Regarding point 1: You are absolutely misguided. I have no obligation to defend them disgusting things until it is the government that is prosecuting the speech, rather than the community.

We have a moral obligation to protect free speech from government intrusion.

We have an equal or greater moral obligation to personally confront the KKK, and sexual predators in order to enforce moral standards within our community.

The government's job is to make sure we both get to speak, and don't kill each other over the disagreement. The first amendment has nothing to do with protecting KKK members from public shaming and expulsion for the views they profess.