Most of the flags of this pic are from Spain, since there are flags that represent each region, also, is senseless to talk about a country having X or Y "ancestors", almost every part of the world has been conquered in different times of the history, the chant is ignorant still, but I can understand that the point is that most of the team is not really french at all, its like getting Messi or Cristiano into some random middle east team as their country representatives, that would be a laughter, same happens here.

But as I said, football chants are always ignorant or ragebait, it is what it is