I think they are contemptuous and rude.
Nah, just light-hearted banter, much like Inspector Fowler in Thin Blue Line
. Or, with the boot on the other foot, the iconic French Taunter sketch in Monty Python's Holy Grail
Consequently there is strong probalilité that you have French origins.
Except that I didn't say I was of English (and therefore perhaps French) heritage, although I was born in England...