-—Spanish Inquisition, still around today? Nope.-—
It was part of a centuries-long effort to drive the Mohammedans out of Spain. The king was afraid of Mohammedan-sympathizing Jews falsely converting to Christianity.
The Myth of the Spanish Inquisition:
https://www.youtube.com/watch?v=CY-pS6iLFuc
No-one expected that.