The right to protest is not equivalent to the right to shutdown other people's speaking or listening rights. The protestors cross the line when they resort to

The right to protest is not equivalent to the right to shutdown other people's speaking or listening rights. The protestors cross the line when they resort to using intimidation, physical obstruction, threats of violence, and/or actual violence. In most municipalities, such violations would be addressed quickly by the police. However, universities (and increasingly large left-leaning cities) have tolerated protestors use of intimidation and obstruction. One could argue why but I suspect it's a variety of practical as well as ideological reasons.