People on both the left and the right apply extreme social pressures to get their way, to stifle dissent (especially within their own groupings), to block discussion or debate of certain topics. Almost everyone has a blind spot in this respect.
E.g. There should be no question that if a student at Liberty University made public statements in favor of SSM, they would be sanctioned, punished and possibly expelled. (I don't know if they'd be harassed by other students, but it is certainly possible.) If a student at UC Berkeley made public statements against SSM, they would be ostracized and probably harassed, but not sanctioned, punished or expelled unless they violated university rules.
The idea that this rather basic human tendency is somehow inextricably linked to one specific political persuasion is slightly ridiculous.