I for my part, apologize for getting way too abrasive.
I just get frustrated by the, in my opinion, completely lackluster DLCs Paradox releases, which are I think very lazy an uninspired. They already did this with Man The Guns, and now they seem to do exactly the same with La Résistance: they add a new, small, not that well designed in most cases, mechanic to the game, and then they glue to it a couple of new focus trees and some alternative history to justify asking 20€ for it. For that price, the least they could do with the alternative history is to sit down and think about what they are going to do about it, instead of looking at a popular mod and basically copying the idea: The second ACW for Man The Guns, and now the Spanish situation, again basically copied from Kaiserreich.
Kaiserreich deals with the ridiculousness by completely dispensing with the original context: There's a new timeline going all the way back to World War I, so they can come up with things like Carlism being the only refuge for the right wingers discontent with the Spanish monarchy, since fascism is not as popular in Europe as it was in real life, but that is clearly not the situation in 1936 and Vanilla HOI IV. Or a bloke that believes himself the second Gengis Khan.
I admit I haven't got the faintest idea if Paradox actually try to explain how this could happen, how Carlism could present a serious alternative to both liberal democracy and fascism in 1936, seeing its steady decline for all the XX century, but knowing Paradox, they probably don't, they just put the button there, and collect the 20€. They don't even try to hide it any more.
Let's see how long it takes them to add the Mongol Empire as alternative history to the vanilla game.