Maybe it's time to change your friends?
- there is a lot of criminality in Paris and suburbs, but I have been robbed only once, in a real shithole. There is a lot of white collar criminality too.
- there are no non-french neighborhood, most people have french citizenship, most immigrants are from a french speaking country, and even inside a high immigration area, since people are coming from different countries, french language still serves as a communication tool. You will find a foreign language inside a family, sometimes the women won't speak french, but certainly not an entire neighborhood (you will definitely hear some foreign languages in the streets). And contrary to popular belief, almost nobody speaks natively arabic, you will find popular arabic courses (because speaking arabic looks cool in somme communities, and for reading the koran), but very few native speakers.
- I'd be very interested in detailed stories of non-white looking people not carrying an ID in France, last time I heard of a brown guy not having an ID it was in the news because the guy was released in appeal: "looking north african does not constitute a reasonable suspicion" (first time ever in France that a racist targeting derails a procedure). It gives you the tonality of the police here. If's you're not white, don't drive a luxury car, you'll get harassed.
Don't go out without an ID if you're not white in France, never. They can and will detain you for 4h without any suspicion of crime. Since it's not a criminal procedure, you'll have no lawyer.
I'm white, I always go out without an ID, because of white privilege, but my mixed race nephew doesn't have that luxury.
(street cred: I lived in a Paris suburb from birth to 18yo, in a shitty area, then I considered my debt to society repaid and I lived everywhere but Paris)