I dont subscribe to the view that if a group is predominantly black (or any other race colour or creed) you cannot say anything about their behaviour.
I said earlier that I didnt think the subject of the post was a from good reliable source, however if true he had every right to say it.
Implying any group is all bad is wrong and bigoted.
But the implication that nothing bad should be said because they are predominantly black is madness.
The bag story may or may not be true, its spreading though, this is how urban legends form.