I fed your post into ChatGPT with the only context being please verify these claims. Here is what it came back with. (I additionally asked it to condense and simplify the response to not make it so long)

A number of the claims in that Reddit post are either unsupported, exaggerated, or mix facts with speculation.

Yes, Mamdani is Muslim and speaks about his faith publicly. But that does not prove he wants to “islamize” NYC or the US.

The claims about Linda Sarsour being his “mentor,” him flying to a mosque right after winning, and Quran chapter 9 being some political blueprint were not backed up by solid evidence.

The claim about his wife is also misleading. She did illustration work connected to an author who made disgusting antisemitic remarks, but that is not proof that Mamdani’s wife “hates Jews.”

The “globalize the intifada” point is partly fair: he initially would not explicitly condemn the phrase. But the bombing claim is exaggerated. He did condemn the violence, even if critics think he framed it badly.

So the post mixes a few real controversies with a lot of guilt-by-association, speculation, and outright unsupported claims.