The "rightful owner" talk is stupid, but the original Gibraltar's inhabitants were outright expelled from their homes since they did not want to sign an alliegance to the British crown, latter to be replaced by colonists that (surprise!) really want Gibraltar to keep being a UK territory. This is hardly a black and white issue.
Morocco didn't existed back then, unlike Spain. The Moroccan state was born way latter.
But the Spanish 'stole' it from Morocco.
Morocco didn't existed back then, unlike Spain. The Moroccan state was born way latter.