Spain was also Fascist at the time, until 1978.
I saw Guernica in Montreal in the 1970s, because Picasso had sworn that Guernica would not return to Spain until democracy did.
I don't think it's an accident that you didn't know this, or any fault of your own. You were deliberately not taught this.
I met a young American librarian many years ago who told me, "In one of my first classes in University, I said something in class. Everyone laughed at me, and I suddenly realized that the US had not won the Vietnam War."
This was a very well-read person, not ignorant, who had simply been taught a lie.
Have many claps for being willing to learn new things!