Is it within its rights?
Something doesn't seem quite right there.
Super League stance shouldn't really affect the application of rules.
Yes, within its rights. He doesn't have to make an exception for Bar?a. Bar?a wanted to find a compromise, he made an offer, Bar?a refused.
He is the boss of La Liga and he feels Super League threatens his organization and its product. He would be a fool not to try and take advantage of the situation to secure a stronger postion for his side. You won't do a favour to someone who is backstabbing you.