Who are the Nazis?

On August 24 there was a neo nazi rally in Washington D.C. along with a counter rally. The writer of the article sited below went displaying an Israeli flag. She was basically attacked. Guess by who?

I have never felt more proud or more alone
". . . The crowd of anti-Nazi protesters did not have the same nonviolent ideology. I was spat upon. I was physically and verbally threatened. Grown men accosted me and tried to rip the Israeli flag out of my hands [this is actually an assault/battery (as is being spit upon) and the people should have been arrested]. Several were very close to actually assaulting me. Police intervened and blocked the anti-Nazi protesters from approaching me. These were supposed to be the good guys, and yet the hatred they exuded was just as potent as that of the Nazis themselves. "