I kinda get what you mean, am I’m really weirded out by how obsessed the US is with ethnic groups, like “black vote”, “white vote” etc, because most countries don’t focus on race like that.
But data wise, Trump barely increased his vote share in white men over last election, but significantly increased in black men, so I think that’s why some data analysts are pointing it out as an interesting shift in the electorate. However to suggest it’s any ethnic group’s “fault” someone won is just stupid. And if you’re gonna do that, try gen-X white men living in the countryside.