Roundabout rules are different in France. I forget which way it works there (long time since I've driven in France), whether it's the vehicle entering the roundabout or the vehicle in the roundabout or the vehicle exiting the roundabout, but one of them has the right-of-way and it's not the same one as here in Norway, nor is it the same one as in the US. So ... that may be what that was about. When on holidays, be sure to learn any differences about the rules of the road.
Which is not to say that your angry driver necessarily was in the right or that you necessarily were in the wrong. It could be just some nasty driver who doesn't like cyclists in his way. But still, it's best to know the local rules.