On the internet words like terrorist, fascist, and genocide seemingly has lost all meaning. It’s just an expression of dumb emotions.
But in a court of law these words do have defined meanings. The internet != real life.
And yeah a law in which the intent is to reduce antisemitism by banning symbols carried by antisemitic people may result in it being illegal for you to display your black flag in public if that same flag as carried by people who promote violence against Jews.
This might trigger some introspection in some people about why they’re in possession of symbols that are also carried by people that promote racist violence. Is there is significant difference between your black flag and a swastika in terms of how those symbols affect people?