Because the video's show a) the Nazis being more violent b) they showed up wanting to cause trouble (see the Vice report on this), and c) they are the only one's who killed someone
This.
The "right" (I hesitate to dignify them by calling them that)
Also this. These people are not conservatives; they are fascists.This can't be emphasized enough. The fact that a sitting Republican President did anything less than immediately condemn them without hesitation should have enraged every Republican and member of the conservative movement in this country. He put himself so ridiculously out of the mainstream with that presser, as evidenced by dozens of elected Republicans publicly criticizing them.