What I said would surely help. If I remember correctly 8% of France population is Muslim and the attack was orchestrated and carried out by a handful of people who were raised in France. Who is at fault here is the French intelligence.
Nope. Who is at fault are those who decided to pick up weapons and strap on suicide vests. The question is how to best mitigate those. I don't really see that "race" factors into it though.