Walking out of the room is their right.
And any damage they may have caused to university property is covered by normal legal standards.
Their verbal outbursts are FREE SPEECH (they weren't shouting down or silencing anyone).
If you refuse to accept the "FACT" that "GOD" sent their "son" to die for your "sins" shouldn't make you a "crazy person".
There is no LAW that forces people to agree with "FACTS".
This is the core of FREE SPEECH.