I was really fascinated by this data, so I asked Pew to pull out some cross tabs of white college-educated people, to identify the core of concern about Biden's oldness/whiteness.

Here's what I got... https://twitter.com/SteveKornacki/status/1252611949969498113

Percent of Democrats who say they're bothered by the fact that Biden is an old white guy:

All Dems: 41%
Black: 28%
Hispanic: 30%
White: 49%
Under 30: 54%
Post-grad: 58%
White college-ed under 50: 64%
White college-ed women under 50: 69%