People fabricate these categories like "alt-right" so that they can group those they do not like in with those that perform horrible acts.

It is not clever, it is not insightful, it is not even logical.

Now someone will just as validly blame the anti-Semitic acts on the Democrats because Trump has Jewish grandchildren and this is a way to get  back at him.

Or they will blame it on the alt-left because the left is terrified of religious beliefs.

So let's knock it off, stop with the group think theories, and attack the problem directly.