The Iberian peninsula was mostly Christian by the fall of the Roman Empire, but its new Gothic rulers were Arians. Did this effect its strong Catholicism and opposition to protestantism? Obviously, it was under Muslim rule more recently. Then all Muslims and Jews were forced to leave or convert. The Inquisition persecuted lapsed "new Christians" and "heretics". I wonder if both experiences of pressure to join other religions effected Spain's strong Catholicism, holy wars, and intolerance.