After the recission of the Edict of Nantes, no one in his right mind would stay in france and let anyone know he was a Protestant. Still, the neighbors knew and turned 'em in to the committees of public safety and agents from Paris.
Nothing in the historical record squares with this claim.
To reiterate:
(1) The Vendee revolt was a revolt of Roman Catholics against an officially atheist government which had publicly desecrated the Cathedral of Notre Dame as part of a campaign of anti-Catholic propaganda. This same government persecuted the Catholic clergy by forcing them to renounce their ecclesiastical loyalty to the Pope. As a result the clergy who refused to betray the Pope were jailed, killed, or driven underground. The Committee Of Public Safety publicly guillotined 16 Carmelite nuns for their prioress' refusal to swear an oath disowning the Pope.
(2) The Vendee resistance coalesced into an army which called itself the Royal And Catholic Army Of France. The rank and file of this army were not uniformed but identified themselves with specifically Catholic symbols - badges representing the Two Hearts, a Catholic devotion which Calvinists would have found repugnant.
(3) Carrier was a general appointed by The Committee Of Public Safety who was an outspoken anti-clerical and he was an early member of the Jacobin Club - the most anti-Catholic faction in the Constituent Assembly.
(4) Not only was the revolutionary regime aggressively anti-Catholic, it was pro-Protestant.
The discriminatory laws that were enacted against Protestants following the Revocation of the Edict of Nantes were themselves revoked by the revolutionary law of December 15, 1790 inviting the descendants of all Huguenots who had been driven from the country following the Revocation to return, and to have their citizenship reinstated. Carrier's Jacobin Club was the group in the Constituent Assembly which authored this law and which was instrumental in its passage.
(5) Very few Huguenots bothered to return, since they were very prosperous in England, Germany and Canada and return to France may have restored their rights on the one hand, but it would have subjected them and their children to the Conscription Acts that drafted citizens into the army.
The only Huguenots who did return were the ones who were fervent supporters of the Constituent Assembly.
(6) The original Protestant community of the Vendee were the Calvinist congregations of the port city of La Rochelle. They numbered about 20,000-25,000 before the Revocation and had strong ties to Huguenots in England and the New World, since all the prominent families in the community were involved in shipping.
There had been even more of them before, but many had been driven out during the siege of La Rochelle, when Cardinal Richelieu brutally repressed a Protestant uprising in the area led by the Duc de Rohan in the 1620s.
As a result the Huguenots of the Vendee had many relatives who had already settled in England and even in the New World in the 1630s, and when the Revocation happened it was very easy for them to leave because there were immigrant communities overseas to welcome them.
Something like half the Protestant population of the Vendee was living in Shoreditch within months after the Revocation. Another large crew of fleeing Vendee Protestants from la Rochelle founded the beautiful town of New Rochelle on the Hudson river in New York.
Ultimately, I believe you are confusing the Roman Catholic uprising in the Vendee of the 1790s with the Huguenot uprising in the Vendee of the 1620s.
Carrier was mildly pro-Protestant and viciously anti-Catholic. The tiny remnant of French Protestants around in the 1790s had absolutely no motivation to throw in their lot with a bunch of Catholics protesting an anti-Papal measure and Carrier had absolutely no motivation to persecute Protestants since the Protestants never registered any organized complaint of any kind against the revolutionary government. His party was the engine of pro-Protestant legal reforms in the Constituent Assembly.