Who is actively calling for the dismantling of the United States? No one. But Israel is fair game.
Because we "won". There are almost no indigenous people left in the United States, because we killed nearly all of them and destroyed their culture and civilization. I hope that this does not happen to Palestinians. For those indigenous people that remain, I definitely support greatly expanded rights and territory.
If you actively call out for Israel to be dismantled I would expect for Europe to at least give away 50% of it's wealth to the people it destroyed.
One could argue on the number and logistics, but I absolutely support stronger European reparations for the damage done by colonialism.