I agree with your point but I think the Palestinian genocide is a bad example. Imo better examples from the top of my mind: the Rwandan and Cambodian genocides likely were far worse both in absolute numbers and as a % of the population, and the policies of Maoist China got many more people killed.
And the Palestinian genocide and your other examples aren’t “worse” in any metric (yet). The use and misrepresentation of those examples just tells us that you’re a tankie who engages in whataboutism and spreads untruths to build a narrative.