Hi a little sentence about the French

I had a bet with a French friend...a little friendly dissing in the other's respective language ^^;;

What I meant to say was :
The french? Where do I begin! They are so arrogant but no one knows why.

This is what I came up with...
Les francais? Ou dois-je commencer! Ils sont arrogants mais tout le monde ne sait pas pourquoi.


Thank you for helping me out ^^