Your ‘solution’ is offensive.
Perhaps a better idea would be for all civilians to arm themselves.
Would you have the jews wear headscarves instead?
That would be offensive to Pollyanna Balloon heads who see neither the reality or danger of a display that says “I am a Jew to a bunch of Thugs that are looking to kill Jews”. As to your other implication, stick that!
But arming themselves is not a bad idea.