It is utter nonsense to argue that anti-Asian violence is tantamount to any violence toward Asians. It is the same as arguing that most interracial crime is racially motivated. Most crime has absolutely nothing to do with racial bias; you can't simply take a crime of a white person killing a black person and argue it's related to racial bias. You base this argument on the idea that hate crime statistics is incomplete, but to simply argue that this translates to attitudes about racial discrimination is way off.
The fact that
Black Americans are more likely than white or Hispanic Americans to recognize racism toward Asian Americans, and
that Asian Americans who experience discrimination are more likely to recognize political commonality with Black Americans suggests that hate crime statistics are not meaningless, they do reflect a trend. The fact that Black people are not considered the main source of racial discrimination and they are not the primary offenders of hate crimes is a big indicator that
hate crime statistics over 22 years are reflective of the other data trends. The fact that most Asians do not see Black people as responsible for discrimination toward Asians suggests that arguments about racial bias are nonsensical.
White supremacy is the main reason why Asians are treated like outsiders in United States. It's the reason they've received xenophobic attitudes about not belonging to the United States since the 19th century. Likewise, ideas about dirty immigrants bringing disease into the United States is all rooted in white supremacy. I think you missed the point of this article, it is not saying that Asians are being attacking under the pretext of white supremacy. No, the argument is the attitudes and negative treatment of Asians in the United States is rooted in white supremacy. The attitude that Asians feel they don't belong and being treated as the other is a byproduct of white supremacy.
This is similar to African Americans viewing Africans as backwards and/or primitive. Those views are rooted in white supremacy where Black people were constantly filled with the view that African names, culture, religion, etc., were all inferior. That's what made the Afrocentric movement so radical, as it erased those views of inferiority. We see that same attitude with Asians and Black people where there is an increased belief in their shared experience.