Get 'em on film as saying so and take it to the governor, see what happens.
And actually, since the national office pulled the fraternty's license or charter or whatever it is, the university isn't severing ties with anything but a bunch of ex-frat boys squatting in one of the university's buildings.
The local chapter of SAE simply didn't exist at that point.
Not as sure about who actually holds the deed to the house, but if it is on-campus, it's a good bet that the University of Oklahoma now owns the house.