The blanket ban on this group is broader than is necessary to prevent the group from shouting down those that disagree with them.  You wouldn't, for example, allow USF to ban LGBT groups simply because they might try to shout down Milo Yiannopoulos.  And as for putting a blanket ban on SJP because they (allegedly) espouse "blanket anti-semitism," well, that would be protected speech too, if this were a public university --- regardless of how distasteful to you and me.   Does a Fordham now say its speech code is less protective than that of, say, LSU?