Pitbull represents Pitbull. If he says something racist or offensive, he doesn't have to answer to anyone. Terry Frei worked for and represented the Denver Post, which happens to be a left-leaning news publication. Frei knew this and still sent the tweet. His firing seems a bit extreme and IMO should have been a suspension, but again, he works for and publicly represents a liberal news company and knew a tweet like that wouldn't be tolerated by his DP superiors.