I believe OU has destroyed the Fraternity, and thereby tainted everyone who belonged to it, all on the basis of what those people in that video did.
Unless that small handful of people constitutes the bulk of the Fraternity, I would say that the people in power are guilty of the same offense they complain about; Judging people as a group, rather than as individuals.
Do you believe everyone in that fraternity condones what those people did? Should everyone in that fraternity have to bear the consequences for what those few did?
Oh, and to address your point about the difference between social sanction and government sanction :
The University of Oklahoma is a state-supported institution of higher education supported by legislative funds derived from State of Oklahoma tax revenue. As a state, tax-supported institution, the University gives preference in tuition pricing to residents of the State of Oklahoma.
It would seem that government sanction applies here.
No this particular house of the fraternity destroyed itself with stupid behavior.
The fraternity is a for profit corporation operating on the campus under a charter that required specific performance. They broke that agreement and have been thrown off campus.
All of the adverse treatment is a result of their stupid behavior.