Problem is, discrimination is protected
1st generation clumping is one thing, no escape for the 3rd/4th generation is something else altogether.
In Belgium, the legal environment is upside down compared to the US. You can't say racist things, but you can act, even if not officially. The burden of proof is on the target and it is near impossible to meet the bar. There is a catch-22 situation where the cops won't get off their duff without evidence and any evidence collected by a private individual is consider outside the law. This is why housing discrimination complaints usually end up in the round file.
Employment complaints are similar. A while back, Adecco got caught marking positions the equivalent of "slegs vir blankes". The only thing that ever came of it was a promise by Adecco to never ever do that again. Nothing was ever undertaken against the requesters. No one has ever checked up with Adecco.
Molenbeek, the town now in the news, has been left to rot for years. Even though it is one of the 19 that make up the Brussels agglomeration, it got no help dealing with the big city problems dumped on its doorstep.
The US news just mentioned certain governors will attempt to block the resettlement of Syrian refugees. That is actually pretty mild. ~ Three weeks ago, the mayor of Koksijde, a tourist trap on the coast about an hour from where I grew up, cooked up the idea that all refugees should be forced to wear visible markings on their clothing. (1. Where have I heard that one before? 2. Plenty of national level politicos thought that was a wonderful idea...)
(And just in case: this is not condoning/apologizing for/... what happened in Paris. I would just like to make clear that this should not have come as a surprise to anyone in office in Belgium and France. Unfortunately, given that the extreme right has been hovering a half a vote away from regaining national control in substantial parts of Europe, I don't foresee any sensible attempts at defusig the situation any time soon.)