Is it constitution to prohibit people from carrying signs on public property? I wasn’t there and I don’t know anything about the group. But I did see one note here that at one point the authorities were attempting to confiscate a cell phone that was recording the incident. That sounds like an attempt to hide evidence to me.
Of course the campus Police had no right to try to attempt to take the cell phone - I imagine the cops behavior was not good and that’s why they wanted it.
Senior Campus staff are charged both with keeping order and the smooth running of campus activities. To ask people to comply with reasonable instructions to do so is not against freedom of speech.
The campus staff had asked them not to use signs - suely Christians of all people should show respect to the people in authority (see Romans). This ‘evangelism’ seems to be more about showing up a possible ‘freedom of speech’ breech than about preaching the Gospel.
Mel