Don't try to excuse violent behaviour. It's never justified.
Although going on experience, many of the ethnics I've seen have poor-quality qualifications from rubbish universities. For talented people with a good degree, the doors are just as open.
I think the only issue here, is that we don't have South African-style BEE in France, so you don't get a free leg-up for having a brown skin or a foreign-sounding name. France is brutally meritocratic, as far as I can tell.
I think it's got to do with Muslim external locus of control; Muslims like to blame everything and everybody else but themselves for their problems. Blaming their surnames, or the colours of their own skin is a luxury that white people don't have.
"Inshallah" isn't just a word. It's a state of mind which entrenches laziness, indolence, apathy and fatalism.
Rephrased, if you can't succeed in the West, you are shit.
Having a brown skin doesn't entitle you to special treatment, as much as Muslims love to go around complaining and loudly demanding special treatment. Basically, if they can't "cut it", they should do what tens of millions of white people in the late 19th/early 20th century, up sticks, and move to greener pastures. Or are they too good for that? There is no right to be liked or accepted.