Speaking as somebody who's lived in France, Greece, the UK, the US and Sweden: France is by far the most "multiculturalism-friendly" place of all these. Yes, even more than Sweden.
Like most French people, I'm not proud of my country. But this is something I can be proud of.
(Disclaimer: Some cities are of course less kind to strangers than others; it's not a uniform utopia)
I come from the maghreb region and lived in France for a while. I experienced racism at work and outside of it.
If you are arab looking or black, you better emmigrate to another country like UK/US or even germany for a better chance. If you don't you are doomed.
For those who don't understand what I'm talking about check a movie called "La Haine".
And I agree with you, it might be different in other cities.