If it was the first event like this, perhaps you would be right. But there is a long, long trend of out-of-control blacks refusing to follow police orders.
Blacks have a "culture" that includes songs like "F**K the Police", and approves of defiance of police. Talk to any big-city cop and they will tell you that in general young blacks are the hardest people they deal with.
Look at the statistics for US Prisons, blacks are amazingly over-represented as a percentage. Even more so in woman's prisons. This chart is from the US Dept. of Justice web site:
So, sadly, race does have something to do with it.
And illegal immigrants (Muslims, Mexicans, South Americans), Anarchists, college-students, White-supremacists, and teenagers in general.
So, sadly, race does have something to do with it.
Actually, it is more like a 'sub-culture' that uses skin color to hide behind. Other 'sub-cultures' use different disguises to hide behind, including religion.