So learn something already.
So what did the indigenous South Americans learn from their confrontation with a "convert or die" theology, that might apply today?
Of course, this would be granting that your interpretation of history was in any way accurate.
The missionaries that accompanied the Europeans who invaded South and Central America were minor appendages to the main goals of bloody secular conquest and looting. Only by the most bizarre stretch of the imagination can you say Pizarro went to Peru, or Cortez to Mexico, in order to convert the natives to Christianity.