@Health, the neo-Nazis came first. The entire rally was organized by Richard Spencer (if you don’t know who that is, there’s nothing to talk about).
And you misunderstood what me and my fellow commenters were saying. Not everyone at that rally were neo-Nazis. But someone who demonstrates with them, while s/he might not be a neo-Nazi, is not a fine person at all.
And @MTAB is absolutely right. It’s increasingly common to have anti-Semites supporting the state of Israel. Richard Spencer, for example, openly supports Israel. There are two reasons that that can happen:
1. Many of these white supremacists believe that Jews should be in their own land, quarantined away from the world.
2. It says in the Bible that the redeemer will come once all the Jews live in the land of Israel.
So no, it’s actually not so uncommon to find an anti-Semitic supporter of Israel.