It’s not that objective facts are always the tool of white supremacy - but rather that facts on their own can be used to reinforce white supremacist culture.
Right-wing media folks can point to a fact about black people being convicted of violent crimes at a higher rate than others in a way that carries the implication (or sometimes explicit point) that the black people or their culture must be the cause.
The idea is that this is a gross oversimplification and eschews many important factors about US history a la slavery, Jim Crow, redlining, etc that have disproportionally affected black communities which has caused generational poverty.
So just saying some fact uncritically is often a tool used by white supremacists (and others in countless contexts).
I’m mostly just responding because this lunacy isn’t what people who have studied and wrote about this extensively (such as the author) espouse - or at least it’s a massive oversimplification