Really?

I had a customer in the Netherlands for years and was there on vacations as well
I'm always needing to adjust, because I find them so open and friendly

At least with Portugal we had the same experience :⁠-⁠)

France is quite hit or miss.
In my experience it's either one of the friendliest person I've ever met or a real asshole.
Seemingly nothing in between.

But maybe it's just relative to the culture we're coming from...

I'm from Austria and met some Afghans at a paintball tournament.
They showed me pictures of them afterwards, where they were standing in the desert with AKs, because of the war.
They had a real problem at first in Austria, because after a beer or two, it could be that they hug you while talking, whereas in their home region eye contact alone was enough to start a fight.