Apparently they were primarily mad at the politicians, not the royals.
Prime Minister Sánchez and the head of Valencian regional government, Carlos Mazón, joined the royal couple on the visit, but were swiftly evacuated as the crowd grew increasingly hostile.
Spanish media reports that objects were hurled at Sánchez, while footage verified by the BBC appears to show stones being thrown at his car as he was driven away.
After he left, the crowd chanted: “Where is Sánchez?”
They sped it up and they love it