If they can decide to do something different than France dictates they need to do so.
Humans are humans and it does not matter what your passport says.
Negative humans are equal.
For those happy with the border blocks and keeping negative tested Americans out the argument makes no sense.
For those fearful, isolate yourselves, but let the vast younger population live/make a living.
Negative testing prior to departure and on arrival is a sensible approach.
Those who pop positive go into quarantine.
Those who Don’t enjoy a vacation and keep folks employed