I don’t mind taciturn people in the morning, I steer that way a bit myself, I won’t abide outright rudeness.
Not being a ‘morning person’ isn’t a medical condition.
Strange thing with the French, a working gang will usually shake hands and greet each other properly at the first meeting of the day.
When someone does that to you (on the odd occasion a French firm brings us in for tricky stuff) it can be a bit of a shock, but it does get you to sort of get you human interaction stuff together.
It does make you realise you’re all working together, so pull your socks up.