1) Freedom of Speech means you have the right to speak your mind without being punished or censored by the government. It does not mean other people have to listen to you, and it does not mean they can’t yell over you if you’re saying something disgusting and inflammatory. The Biker Dude has just as much right to do what he’s doing as the Neo-Nazi. Nobody’s right is being infringed upon here.
2) The guy is “passionate about” hating and inciting violence against Jews. I’m passionate about information literacy, candle-making, and giving snuggles to my pet rabbit. There’s a fucking difference, there.
3) “Agree to disagree” is something you say when two people can’t come to a consensus over whether or not The Empire Strikes Back is the best Star Wars movie. It’s not something you say when one person is Jewish and the other person believes Jews are a evil satanic cabal trying to enslave the white race who must be stopped at all costs. That’s not an “agree to disagree” topic. We don’t “agree to disagree” over the issue of whether or not Jews are people. We don’t “agree to disagree” over whether or not black people, immigrants, Muslims, LGBTQ folks, etc. are deserving of basic human rights. These things are not up for debate, and there is no middle-ground to be had with people who think otherwise.