The problem is not the genetic characteristics of whiteness or maleness. It's that they grew up in a society that favors whiteness and maleness, and is much more accepting of the abuse of people who aren't so favored. If Twitter had started in China, where the Han are favored over ethnic minority groups like Tibetans and the Uyghur, it would be the same dynamic but with different ethnic groups.
Of course, tech is disproportionately white and male, so it's entirely unsurprising that HN readers have risen up en masse to defend the honor of white men. It exactly proves the point. White men will say that fighting abuse is important. But when they have to show their real priorities by how they allocate time and effort, actually understanding the abuse problem and how it disproportionately effects minorities comes well after defending their own interests.
(And: Yes yes, not all white men. Generalizations are general statements that may or may not apply to an individual.)