Whatever the outcome of the investigation at the end the general public will only remember "french staff beating british passengers".
No. General public will remember "British hooligan attacks airport worker". Would be interesting to know whether the passenger was (i) completely smashed (ii) with a normal British level of alcohol in his blood (="drunk") or (iii) only slightly tipsy.
I know stereotypes, and no, not all Brits are that way. But nowhere in Europe do you so much vulgar-violent behaviour. Go to one of their Mediterranean hangouts (Ibiza, Torremolinos, etc) or to any British inner city on a Saturday evening and you'll understand why it's dubbed "Monkey Island".
Violence is not the usual way of French un-hospitality. Snobbing you, being unaccomodating, being indifferent about customer needs or concerns - those are much more common.