Honestly I would expect that Germany's history is a reason that current German leadership would be inclined to back Israel even when it isn't a good move. The Jews weren't the only victims of the Holocaust, but they were the best known, and Germany wants to be seen supporting Jewish people today because it does not want to be the Germany of old. That doesn't make it right to back Israel's actions in Gaza, but it has reasoning to it

Comparing things to the Holocaust never helped anyone to gather more support for their cause. Especially in Germany. So good luck with that.