Comparing Israel to the Nazis and the treatment of the Palestinians to the Holocaust has been a standard piece of rhetoric for many decades before October 7, it’s not new at all. October 7 was just the natural expression of such hatred, just killing as many Israelis as possible in as brutal a fashion as possible.
Basically the kind of rhetoric and hatred you’re describing is not a result of October 7, October 7 is precisely the ultimate expression of it.
We’re basically just taking about the human capacity and tendency towards evil. This is just a fact of life to be dealt with, there is no solution to it.