This is more of a general comment than a direct response to what you said, so don’t take it as an accusation. A lot of people - and a hell of a lot of people I’ve seen on here - have reacted to the indefensible position that criticism of Israel is inherently antisemitic by swinging to an equally indefensible position that you cannot be antisemitic as long as you’re being critical of Israel.
The guy making this quote is very much trying to do the indefensible thing. While you can absolutely be antisemitic in criticism of Israel, that is at most a tiny sliver of anti-Israeli speech on the left (not a Nazi pretending) and yet there is a concerted effort to try to use that to silence criticism by Israel whole cloth (including active government acts). This isn’t a good faith advocate mistakenly blurring lines. He’s very much trying to tar opposition to Israel (his birth country according to Wiki) or support for their enemy as hate speech. We don’t need to pretend this is happening in a void, absent of ongoing campaigns to silence anti-Israel criticism or without the context of the speaker’s own words trying to conflate a support for Israeli’s victims as criticism with Jewish people.
I don’t think it’s naïve to make the assumption that these are all good arrests for actual hate speech (for one I expect there are many more than 17 public antisemitic statements), German municipal governments have banned pro-Palestinian events, so it’s not really like you can be 100% sure the German government would never blur lines as the quoted speaker wants.