When reading anything on The Guardian it's important to ask what they aren't telling you, because it's almost certain that they are omitting many very salient details out in order to fit the story into their own narrative. If you knew that Nieto had other problems, you likely wouldn't come away from the Guardian article believing that he was executed for being Hispanic.
The Guardian and Salon are two of the worst offenders. I learned a little while ago that Sam Harris took on Salon. I always thought Sam Harris was a blowhard and annoying to listen to, but I have a lot of respect for him now. We need more honest, courageous intellectuals to take on the fourth estate.