I think the "alt-right" term has its use. After all, not all of the people we are talking about here are sadistic monsters. Even among those engaging in the juvenile, antagonistic bigotism and bullying that is pervasive on /r/the_donald are a large group of otherwise reasonable people who feel alienated by the progressive left, and have simply bought into the all of the recent rhetoric against political correctness.
Those people have been mislead, to be sure, but it isn't accurate or useful to assume they are malicious.
Those people have been mislead, to be sure, but it isn't accurate or useful to assume they are malicious.