because moderates/neoleberals suck.
take the L on this issue
Dems couldn't complain about Abbott sending them migrants, because it would be an open admission that migrants are a massive burden when they show up at the border with nothing. tired of progressives trying to sugarcoat this

you can't lie about why they didn't/couldn't say shyt to Abbott on this;
you know why they didn't
the moment you filed your fukkin lawsuit, Republicans would have turned it into a national conversation about "well why do you expect Texas to take in all these illegals, but blue areas won't take any?" you would have lost MASSIVELY in the common-sense court of public opinion
Eric Adams begging for money over 4 or 5 busloads of migrants was one of the most embarrassing moments in this party's history. just a total repudiation of your open borders rhetoric