I could say quite a lot in defence of the French, but I wont bother, as it will only be seen as an attack on other nations.
If the USA & UK believe they are justified, then they will go ahead on their own. They certainly are not being assisted by the bigotry shown by the vocal minority of jingoistic idiots that think their voice counts for anything in this world.
I hope that history will prove we did the right thing, whatever that may turn out to be.