Well, obviously it’s not a complete myth. However, there are a number of Jewish politicians who have strong gun rights records. It is more accurate to say that the Democratic party is anti-Gun, and it so happens that most Jewish politicians are Democrats. However, here are some examples of pro-gun Jewish politicians:
Eric Cantor, Republican, Virginia’s 7th congressional district, has an “A” rating from the NRA.
Arlen Spector, Democrat, PA US Senator, “… strongly opposes most gun control, voting against the Brady Bill, background checks at gun shows, the ban on assault weapons, and trigger locks for handguns.” (However, GOA gives him a “D”, which is somewhat confusing).