Franco has been dead for 40 years.
If the only reason for independence is that Spain is a descendant of the Nazis, it seems to me that this is a lie with very little travel.
I insist that the European Union that now includes France, Germany, UK, Portugal, Italy etc … has never ever said that Spain is Nazi, is a dictatorship or even that there is a minimum shadow of suspicion.
You will say that the transition from dictatorship to democracy was not correct but the truth is that all those who had to flee from Spain when it was a dictatorship have become communists included.