Columbus Day comes from a time when white ethnics were still discriminated against. White ethics are not discriminated against anymore.
White ethnics don't EXIST anymore.
You mean white Catholics? In the NY orbit, I still think being Italian has some meaning. It is pretty much gone for the Polish, Irish and of course Germans. Do Greeks count (yes I know not Catholic, but not Orthodox Jewish either, who certainly do have an ethnic identification)?
Friendly reminder that a lot of Hispanics/Latinos check "white" on the Census box. And, like the "white ethnics" of yesteryear, still aren't fully accepted as American by some– but their children and grandchildren eventually will be.
So, yes, we have plenty of white ethnics. Go look around the Ironbound in Newark.
(As for the earlier waves, the individual nationalities still have
some meaning, even the Irish, but yes of course it's faded over time. I think Polish identity is more of a thing still in Chicago where there was a larger community than there is in NYC, where we were vastly outnumbered by Italians/Irish.)