Good luck to them trying. Ben Gvir has tight security, and after a threat like this it will possibly get tighter. That doesnt mean it is impossible. Ben Gvir has been known to abandon his security at times and leave them behind trying to catch up, and Hamas has plenty of sympathizers within Israel that can be recruited to try, or to sneak in from Judea and Samaria... a threat like though though raises the allure of Ben Gvir in the public eye and I wont be surprised if this makes him even more popular.....