That is not true either. There are plenty of people who share religion, but who don't share nationality. If Germans are protestants, are then all protestants Germans? That certainly is not how it seems to work.
Again, you're ignoring the examples of clergymen and even noblemen who participated in the French revolution on the republican side and who wer epopular amongst the revolutionaries, Jaques Roux and Bornaparte being excellent examples. Thus the conflict must be understood in terms of functions rather than tribalist origin. Being a "true Frenchman" in this sense had nothing to do with origin, but about Ethics and function. That kind of nationalism, if that is what you want to call it, has nothing to do with the term we refer to when we say "nationalism" in the 21st century
Which philosophers?
And beyond that, tell me of instances of persecution of the Jews, in the very period where Jews enjoyed the most liberty they had ever enjoyed in French history. They even had it better during the reign of terror than they would later have it druing the 3rd republic.
They were nuns. Meaning clergy. Is there something I am missing here?
The revolution was in no sense anti-catholic. It was not as if believers - beyond religious extremists that usually were also royalists - were executed en masse simply for being religious. Not even during the reign of terror, which saw huge amounts of almost arbitrary executions saw excutions carried out against people simply for keeping faith in any particular religion.
Sure, it was hugely secular, because it believed in civic egalitarianism over religious chauvenism, but this does not mean that religious life or expression was at all supressed in France. Indeed, the sections of Paris largely kept the old calendar.
State atheism as you would later see in Russia or China simply wasn't a thing. At the insttutional level, all things were neutral and secular, for such was the anti-parochial ethics of the French revolutionaries. They were opening up the country and making a common democratic homeland that jews and muslims and others could also participate in.
And again, you're talking about millions of people. If all of them were anti-catholic and deists, France could not be a predominately Catholic nation today.
That simply would make no sense.