Maybe because it happened 1000 years ago and there are people being killed in Gaza at this very moment?
You nicely sidestepped the case of US where Native people are still fighting for their rights and would be killed the same way if they try to perpetrate against Non-Native Americans the things like October 7.
Palestinians perpetrated October 7, Native Americans don't do such things, thus no surprise that the situation is different.
>Maybe because it happened 1000 years ago
So, how old or recent it should be for you to dismiss or not an ethnic cleansing?