Only a small part of the society is playing the immigrant card for the French team, And they did so, by calling French people to support the "Only Left EU White Christian team" that is Croatia. And for that, they became the Pariah of the french society...
You have to understand that Football is sacred in France, even more when your team is in Final... And you can't touch those players...every bad word on them, will get you Dozens and Dozens of Million of French against you, whatever their political or ideological side.
For Us, those players are French... In France, we use the 3 Words "Black-Blanc-Beur" aka Black-White-Arab" Therefore Origin is already accepted for such team... as paying tribute to their heritage and our Multiculturalism.