This post really illustrates the expansion of terms into meaninglessness. One presumes they're referring to the Allies (who themselves would now be considered extremely racist) stopping the Nazis, who allied with the Japanese and were targeting/killing mostly Jewish and Slavic peoples. The Nazis were specifically pro-German/Aryan and whatever they thought that meant ethnically. They did not see things in today's racial terms. It's absurd to describe them as "white nationalists" because they didn't think that being "white" was good. There were a lot of "bad" "white" people in their worldview.

It also seems unlikely that the Nazis would have succeeded in killing many more millions of people than they did without Allied intervention, but at least this requires some unprovable speculation about alternative histories. Either way, can we stop fighting battles almost a century old? Today's bad guys are not yesterday's and yesterday's good guys are not today's good guys.