Not surprising. The whole point of (most of) the modern left is to fight "racism". I've argued we are entering a new era of politics where it will be culture not economics, which decide elections, and we are engulfed in an intense culture war.
And why do you see yourself on the (presumably) anti-left side of that "war"?
I think the main issue WILL be culture. We are already seeing that as economic lines (in terms of party voting) are pretty mixed. For example, it used to be Democrat=working class and Republican=wealthy. Now, both parties are pretty much the same in terms of wealth. Hell, if you subtract African-Americans, Republicans are by average LESS wealthy than the Democrats.
maybe if you're going by household income like that gss study. assuming that's what you're referring to anyway.. but individual level not really
i get the impression republicans would rather just let their party literally die off over the next 20 years or so than change. or at least the super rich donors and people maintaining all the party infrastructure feel that way