Tldr, blacks make up 13% of the population yet commit 27% of violent crimes against asians. While whites make up 62% of the population and commit 24% of the crimes.

(Take into account the government and police often label hispanics as white if they speak English and not spanish)

Black on Asian Violent Crime: THE NUMBERS Analysis https://www.bjs.gov/content/pub/pdf/cv18.pdf

These are government statistics for 2018.

The note for Table 16 in the link above provides the definition of violent crime. Table 12 tells us that:

A. The number of violent incidents with a black offender was 1,155,670

B. The aged 12+ "residential" black population was 33,132,390

Looking at census data, the total black population in 2018 was roughly 42,000,000.

A divided by B yields 3.5% (approximation of violent criminals within the aged 12+ "residential" black population)

A divided by total black population yields 2.8% (approximation of violent criminals within the total black population)

Keep in mind that a single violent incident could be perpetrated by multiple black offenders, but multiple violent incidents could also be perpetrated by a single black offender. Still, these numbers provide a lot of context.

If you look at Table 14, you'll see that:

C. 4.5% of violent crime by black offenders was against Asian victims (do the math)

D. 27.5% of crime against Asian victims was by black offenders

E. 24.1% of crime against Asian victims was by white offenders

F. 24.1% of crime against Asian victims was by Asian offenders

G. 7% of crime against Asian victims was by Hispanic offenders

H. Looking at the anti-Asian portion (4.5%) of the violent crime by 2.8% of the total black population, we are able to approximate that roughly 0.126% (4.5% of 2.8%) of the total black population violently victimized Asians . . . 0.126%.

Now, the number of Asian on Black violent incidents (relatively low) vs. the number of Black on Asian violent incidents (relatively high) is very lop-sided even if you make certain adjustments for factors like population difference. This cannot be denied.

...but I'll let these numbers speak for themselves.

We should be rational in how we define that aggressor. It's essentially 0.126% of black people, some of whom commit especially vicious crimes against Asians, e.g. rape, maiming, killing.