In Germany you will get arrested if you publicly talk about Gaza and Israel

This is just BS. I had and saw many public discussion also on German Marktätze on this topic, some quite heated. Nobody was arrested or removed from their job or otherwise sanctioned. But of course people were disagreeing. The right to free speech is not the right to freedom from contradiction!

Having had that exact discussion with someone in Alexanderplatz right in front of the police building, nope.