I could never imagine the French Gendarmerie being given official orders or even tacit instructions
to victimise Brits.
Yes I could see them being instructed to crack down but on all, and equally, of course you will always
find the individual Gendarme exercising his personal vendettas and prejudices, no doubt some
might have an anti Dutch or German approach. Still some other Gendarmes are probably apt
to pick on their fellow French, simply because they think they should know better.
Doubtless a Bulgarian truckie or 2 might think that Brit cops are always picking on Johnny foreigner
and Bulgies in particular, and probably a few actually do.
I suspect tired behind schedule truckies get pulled over and give the Gendarme or cop a bit of lip with just a
hint of racism, the cop takes it personally, throws the book at the driver. From then on the truckie
thinks the French have got it in for those of whichever nationality he happens to be.
Substitute car motorhome mbike driver rider for truckie and similar scenario ends with similar result.