Critical thinking - would a little Jewish strike group attacking German civilians make the Nazi party hold back and lessen the horrors, or would it have scared the Germans into further supporting the Nazi party and lead to an even more outright assault on Jewish people, making the horrors even worse?

It would have made it worse. Without a doubt, the Holocaust would have been even worse.

You need to be honest with yourself, is this about protecting human life, or do you just fetishize violence against people you hate?