Ethno-nationalists are wrong.
Don't pretend they're the reason that the right has been tarred with the 'racist' label. That is 99% due to relentless campaigns of lies from the Democrats and their willing allies in the media. Ethnonationalists have no meaningful presence in or impact on the Republican party, and haven't since... ever, as far as I've been able to find. The Democrats meanwhile, were the open party of racism 50 years ago.
There are a few fringe nuts, like Richard Spencer, who've tied to tie themselves to the right wing because the left won't have them anymore. There's a few people of more confusing priorities, like a few of the members on here, who are arguably actually right-wing in some regards, and have some strains of ethnonationalism to them.
Those are a vanishingly tiny minority.
It's all about the lies, in the end.