I don't know, it sounds plausible to me
ignorant scaremongering doesn't discriminate by community. If anything there are probably far more white anti-vaxxers than black ones, because they fall in with the general QAnon/Trumpet/thick as pigshit crowd.
( Turing's Artificial Hand Sig Sauer, Thu 6 May 2021, 8:41, archived)

That's exactly it.
In America, anti-vaxxers are disproportionately white. But the nonsense can also find fertile ground in people who have a history of being treated like crap by the medical establishment.
( Mr. Tea 'ulmmm'/'mmneurgh', Thu 6 May 2021, 8:44, archived)