It all started with AB trying to point out the NFL's inconsistency when it comes to the way different players are treated in the wake of negative allegations.
Brown alludes to his former Pittsburgh Steelers teammate, Anthony Chickillo -- who was arrested this year for allegedly attacking his girlfriend.
Chickillo (who is white) was placed on the Commissioner's Exempt List and missed 2 games -- but was allowed to rejoin the team once prosecutors decided to drop the case.
The NFL is still actively investigating -- and Chickillo could face discipline in the future, but for now he's active and playing ... and AB is upset.
"Guess all mighty @nfl can hold players out against there will no criminal charges pending nothing but A Caucasian player gets a domestic go to jail still out there playing targeted hate against us everywhere my peeps."