For one, it would further erode society's respect for academia. People already widely suspect that social-justice minded academics see their position to be more

For one, it would further erode society's respect for academia. People already widely suspect that social-justice minded academics see their position to be more like a soapbox from which to preach rather than an means to carry out an objective pursuit of understanding. A deliberate campaign of exclusion of people they don't like would only serve to confirm this view.