They are already. Antisemitic violence has been on the rise here since October 7. Antisemites see Israel do a thing and think “I know, let's hurt some Jews”
Protesting Israel is considered antisemitism in Germany even if you're Jewish. Real antisemitism is also on the rise but all pro-Palestinian protests are also lumped in. Anti-Zionist jews (Jewish Voice for Peace, etc) always on the forefront of these marches.