They've downed the entire pitcher of Kool-Aid on critical race theory, intersectionality, and Israel annihilation narratives. If Trump weren't attacking them their feud with Pelosi would be front and center for the very reason that they're making Trump's arguments for him and alienating moderate voters with their radicalism.
Pelosi did that passive aggressive interview July 6th attacking the Squad. Trump latched onto it for he wants to highlight both the inter Democratic squabbles and try to create a narrative that Democrats will not work for you, but will work for "the others" when they are not fighting each other, it is meant to sow doubt and conflict.
Trump picked this fight and started attacking them for he thought Pelosi will not do an about face and defend the people she just spent badmouthing.
And 2 weeks later we are still dealing with nonsense to a nonsense story that will not end.