I had always heard that the French Foreign Legion was not ever to be deployed inside France proper.
Things have gotten that bad, apparently. Once upon a time the Foreign Legion battled Muslims in North Africa & the Maghreb.
Now the Muslims have come home to roost in the French homeland. The Foreign Legion was renowned for going take-no-prisoners when necessary. They need to again.
Civilization versus barbarism, it’s that simple.
A friend who lives in Paris told me that it is both regular army and Foreign Legion. I couldn't tell which they were myself but I saw a patrol of 8 soldiers and they looked like they were ready for war. Very formidable, but the fact that such a thing is even necessary in a major world capital speaks volumes.