They're usually Syrians. Not always, but usually...
So I would go, in decreasing order of likelihood: Syrian, Turk, Yemeni, Somali (though some of them are exceptionally aggressive, from experience), Iranian/Iraqi and then maybe sub-Saharan African...
"youths" meaning blacks, or meaning rapefugees?
In Europe they could be either, and there is considerable overlap.
statistically they're mena not black
They're usually Syrians. Not always, but usually...
So I would go, in decreasing order of likelihood: Syrian, Turk, Yemeni, Somali (though some of them are exceptionally aggressive, from experience), Iranian/Iraqi and then maybe sub-Saharan African...