Assuming data itself is biased is the heart of this issue and why people shouldn't be allowed to handle it at all.

Claiming "that era was racist" so all data must be discarded is a cop out and ignores the issues.

Data is nothing but points. Acting like Middle class, Median income A and Lower class, low income B will have similar or equal crime rates is insanity and racism. Pretending like A has the same amount of crime, they're just not patrolled is ignorant at best, racist at worst.