I know that there were similar divisions in European royal families over the Carlist controversy in Spain. In fact, that was the whole reason why the Spaniards opposed the marriage of Infanta Maria de las Mercedes to Prince Carlo of Bourbon-Two Sicilies: his father (Alfonso, Count of Caserta), along with a Parmesan cousin, had fought on behalf of Juan, Count of Montizón, in the Spanish succession war of the 19th century. In fact, there were demonstrations to protest the union.

But the son was not the same person as the father, and Queen Regent Maria Cristina wholeheartedly supported her new son-in-law (a first cousin, once removed) as he joined the royal family. The family of her brother, Archduke Friedrich, Duke of Teschen, largely supported the claim of Queen Isabel II on the throne of Spain. But some of his daughters married into royal families who supported the Carlist cause ...

It had to have been a messy situation elsewhere, with European royals divided over Carlism. Of course, that had nothing to do with a renunciation (like the Sicilian dispute) but rather, King Felipe V earlier trying to impose the Salic law on Spain -- notwithstanding the fact that he owed his claim on the throne to a woman.

It's interesting that the Count of Paris was a stickler for renunciations: perhaps it was because the Orléanists owed their position as French claimants to the Anjou renunciation. It's also interesting that later on, the Carlist faction in Spain was genealogically linked to the Legitimist cause in France. I believe that the house of Orléans have largely supported the claims of Queen Isabel II on the Spanish throne, as well as Queen Maria II on the Portuguese throne. Heck, some of the members have married descendants of these queens regnant ...