NY-13 midterm electorates are only ~20-25% white.
They are ~30-35% Latino and 30-35% Black.
It’s effectively a two-person race, so if Darializa wins she can’t do it with the aforementioned “predominantly white, middle class, suburban college educated type” transplants alone.
Since roughly 2010 a large migration of predominately white, middle class, suburban college educated types have descended into urban cities that were cleaned up btw 1994-2010 by reform moderates like Giuliani. Without knowing it, they inherited a safer and more prosperous city. Many from this cohort use their DSA/lefty politics and canvass for these POC candidates as a way to rationalize their presence in the cities and believe that this kind of politics can correct the inherent asymmetry between their smart little NPR life and the Puerto Rican teens selling weed and pressed pills down the street. Alas, their savior politics actually makes things worse for these people.