re: The streets of Paris now look like the slums of Nairobi

It went on steroids in the past 20 years or so. It was a problem 30+ years ago as well. Marseilles has been grappling with immigrants and non assimilation since the late 70s really. I spent about a year in Montpellier in 1991 and the locals there were all up in arms about the possibility of the French government possibly building a project on the outskirts of town to house the "immigrants" who were largely North African at the time.

Last time I went in 2016, Marseilles was pretty much a slum in totality full of Algerians, Sub-Saharan and Corsicana. Paris was better but it was getting close to that street scene yo just posted....but very much outside the center of town. So if you were on the Champs d'Elysee near the Arch de Triumph you would not see it but as you moved further out, particularly further North you saw it....then you would see tenements and you did not go there...they looked like run down Soviet era apartments.