As horrifyingly bad as Zohran Mamdani is, the main target of Islamists isn't New York City.
Their main target is Israel. Conquering Israel is the primary stepping-stone on the way to restoring the Caliphate.
Hence, stopping the Islamization of the world starts with Israel.
You can criticize the decisions of the Israeli government (sometimes rightly), and you can seek the well-being of Palestinian civilians.
But under NO CIRCUMSTANCES should any sane person support any of this deranged "From the River to the Sea" nonsense.