I presume the joke is that the Military would have attacked had the Jan 6 mob been Black. But FBI stats show that the police do not randomly attack Black folks; let alone the military, who say “the only colour we see is khaki”. So this is more calumny than satire. But it’s harmful because police tend to pull back when they are relentlessly attacked for imagined brutality to the Black population.
The narrative, the incorrect narrative, of random widespread uniformed forces attacks on the Black community is harmful to the Black community.