My wife dislikes anything to do with Islam, especially those of Persian, Semitic or Indian (Pakistan, Bangladesh, Indonesian, etc.) descent. Were they speaking French? I couldn't hear their words clearly enough to say. They may have been born in France, but they are not French (as in the Europeans that helped America in the revolution, fought in the trenches of WW1 or the resistance underground of WW2).
Note: personally, I have no basic prejudice to the groups of people I listed above. I've lived in Qatar, Abu Dhabi, Egypt, Tunisia, Pakistan, India & Indonesia. I only dislike one of these countries, but always found something (many things) positive about all of them. None the less, these folks prefer to congregate in their own 'groups'. The police left them alone for a good reason. (These French bring money to spend (have you ever heard that a French man (insert Scotsman in place of French) squeaks when he walks (because he's so tight)? Well, these Frenchmen spend a lot money. And good on them.