So here is a thought to ponder: why use the Civil Rights Act of 1866 instead of the Title VII of Civil Rights Act of 1964 which prohibits racial discrimination?
Probably because the CRA of 1964 is one of their ultimate targets and it would look goofy using it and then turning on it. The CRA of 1866 obviously has no teeth since it didn't prevent a damn thing once Reconstruction ended.
@BaggerofTea is right, they hate us having a damn thing.