I was cautious earlier in the thread as, as a Jew, I really hoped he hadn't turned up to get a response, but now I'm pretty sure he did and I'm angry because he has just totally played into the antisemitic trope that Jews are whiney and manipulative and trying to play the victim. Now loads of antisemites can go 'Look, there's your proof, they just antagonise people, this is why no one likes Jews' - of course, it's just one guy, but bigots only need one guy, sadly.
But yes, protestors didn't cover themselves in glory either with their comments - if you might be angry and assume a Jewish person is complaining about you to the Police a simple 'Hey, we have the right to protest' would do the trick rather than 'Nazi' or 'Shame on you' - because you don't actually know what they're saying or doing just because they are Jewish.
I have attended a protest as part of the Jewish bloc and my husband attended one not as part of the Jewish block but wearing his kippah and didn't see anything worrying or get any aggro. I suspect any 'visibly Jewish' person in the area of a protest who is minding their own business wouldn't have anything to worry about, but could get a shouting at if they confront protestors in any way, or are perceived to be confrontational, which is more what people worry about I guess.