No matter where 1 goes, 1 will offend or be offended.
What is considered a simple gesture one place offends somewhere else. I.E. In some western countries its fine to touch a child's head while in Thailand its extremely offensive. The Spaniards should have either had sense or done research before the Photo.
It was ignorant and extremely insulting yes. But for the folks blasting the Spaniards with equally insulting terms and bad language or generalizing an entire country or people or race also shows your rascism too.