Yes I worded that poorly.
If I were to go back in time, I would have written.
"one of the big civil rights achievements was to move towards getting rid of that divide."
Also yes, the problem is not the concept of white privilege. As a metric to show the experience of individuals in society it's not a bad thing. As a way of defining individuals it's bad, and as a focus it's not great.
That’s, yes, the central complaint about White privilege. But from the rest of your comment I suspect thst you actually meant to attribute this problem to mentioning White privilege, rather than to White privilege itself.
> IMO one of the big civil rights achievements was to get rid of that divide.
That...didn’t happen. Though the same kind of White moderates whose indifference Dr. King complained of did, after the successes of the 1960s, like to say that it had as a new rationalization for the same indifference.
> I'm white, my wife is not. I fear where my kids will land in all of this. If we are drawing hard lines between people how will half white children find their place in all this mess?
American society has drawn strong lines on race [0] forever, and, yes, that has special (not necessarily uniquely bad, but distinct) impacts on those of mixed race. (Source: nearly half a century living mixed race in America.)
> To me it shouldn't matter they have multiple cultures they come from, in the same way I'm Scottish and Irish.
Black and White in the US isn’t a simple divide of culture, its a divide of shared experience of still-prevalent racism.
[0] Particularly black/white, which is not to say others aren’t issues, but, e.g., the One Drop Rule, intermarriage bans through most of thr country through the mid-20th Century (and the entire South until struck down federally in 1967), and other things particularly focussed on the black/white divide.