My grandfather fought in the Spanish civil war. My mother survived it. Understanding the first hand stories of what happened and personally knowing the tensions of these two regions - this is bad.
Perhaps not Franco bad as that was a civil war complete with air bombs. But, hopefully this won’t inspire ETA to do their share of damage.
This is what I explained to another poster who said that Spaniards were "obsessed" with the civil war. A lot of the people who fought in and were affected by the war are still alive. In the Franco era there were countries using the war as an excuse to test their newest weapons, most notably Germany and Italy. Technically it's still possible for outside countries to supply opposing factions with heavy weapons. Look at Syria. Realistically I don't see it happening and I've bet my future on it by putting down roots in Spain.