Ahhhh...if he continues to be employed by CSU Fresno then yes, his comments do represent the university.
Even in California, where employers have few rights, and employees have many, calling for violence against any person (or, in fact animal or property) would be sufficient cause for dismissal.
Notice I do not say “grounds” but rather “cause.” Grounds describe a valid reason to take an action if the action is otherwise desired or mandated. Cause in this case describes an action by the person to be dismissed which, in and of itself, make the termination mandatory, and simultaneously provides grounds for such termination.