They vote against their own interest because they want people of color to be even poorer and have it worse than them and that’s the way to do it. Culture war at its best.
And by the way all the news reporting that either side is winning in fucking January can’t be taken seriously. Last time in January 2020 Trump was leading the race and the democrats were about to allegedly nominate Bernie. Cut to November and the outcome couldn’t have been any different. We shall see.