First of all the idea that "white" = "colonizing", "non-white" = "colonized" is in itself racist and wrong. There have been hundreds of racially "white" populations colonized by others. For current day example see Ukrainians fighting colonization by Russians as we speak. For other examples see Balts or Irish.

It is abusive and morally reprehensible to demand colonized people "check their privileges" just because in your ignorance you only consider their skin color as relevant. World is bigger than anglosphere, the criteria along which people were discriminated and subjugated varied significantly.

Second of all - the point that the article makes (should race be considered when evaluating mathematical ideas) is different from the point that most comments make (attribution is skewed towards white people). It's perfectly possible to admit skewed attribution and argue against it while agreeing with the article that value of math should not depend on the race of the person who proposes it. I'd call it the only sane option, even.