Both of those views are news to me. I've always had the impression that the Reconquest was an off-and-on series of battles, fought over centuries, mostly by Spaniards. I see no evidence to the contrary in the Wikipedia account. Do you recall the names of historians who claim that the Spaniards were not responsible?
Ever wonder where it came from?
Here's all you need to look for ~ a noble name with the words for a military assignment in the middle, beginning or end ~ in BRETON.
For instance, a name with SA, meaning flag in Breton, might be linked to LINAS, a word meaning LINE ~ a SALINAS was the knight who held the flag on the left or right of the advancing formation of mounted knights.
Even looks Spanish doesn't it?
Look for almost any name that begins CA, CAR, KA, KER ~ all of them are Breton ~ that 'ker' has to do with a common affectation among Bretons for centuries to refer to 'house of' ~ and then whatever else their name was ~ in Celtic!
Some of the nobles adopted French surnames of course ~ as names of war, the French in those days having a reputation for brutality in combat.
All you have to do is remember that the Google.com Welsh translator does a fair job translating Breton as well ~ which will help you dig your way through Breton and French histories.
Brittany and Cornwall both got out of the country business in the 12th to 14th centuries ~ one of the reasons the English and French hog the credit.
Now, who was a Spaniard? Was it the Moslem noble whose family had lived there 500 years or the farm boy with the big horse and heavy sword from Brittany?
With Christian Spain rolled up to the North Coast (The Dead Coast) by the Moslems (7th/8th century AD), they were sitting ducks for fillubsterers from the rest of Europe ~ who arrived and set up Carvajal, Leone and Castile ~ those were the three kingdoms San Cho Noe I is credited with authorizing as he began his invasion from Cornwall ~ hey, he has a Breton name too!!! WOW! He wasn't a Spaniard 'til he got there.
The common denominator was simple ~ on one side the warriors were Christian, and other side they were Moslem. The war lasted from the 7th century to the 15th century ~ a very long war even by Irish standards, but not by Japanese standards (if you need a comparison).
Sometimes the war went one way and sometimes another. At least once other Moslem invaders came in to make a maor push-back against the Christians because the local Moslems proved too week, or too closely affiliated with the Christians to stick to the islamic rules. During other times both the area we call Morocco and Spain were part of a common culture ~ even today they have a special relationship.
(NOTE: Bieber ~ as in Rodrigo Díaz de Vivar ~ AKA El Cid!)