The murder of 6 million Jews + 6 million Poles, Gypsies, Russians etc. by the Germans was done 75+ years ago.
They are a different country now. We cannot blame the grandchildren for the sins of the grandparents.
We can criticize their “call” — and note that it is just a “call” - not a formal statement by any means (Germany doesn’t do that for matters on Israel) and we should criticize it, but if you want to change the German view, it is important to not start off by “your granddads were murderers, end of argument” — I’d rather go and point out that there CAN be no two-state solution as the Arabs do not want a Jewish state.
So the only solution is what Israel is doing — it allows Arabs who want to become Israelis and live peacefully to LIVE in Israel - there is an Arab party, Arabs vote, pray, etc. with complete equal rights as Jews.
Those Arabs who don’t want to live in peace have to be moved - and that’s what Netanyahu is doing.