Why are college kids so against conservative speakers?

I watch Ben Shapiro speak at colleges (on video, not actually at the college). I also occasionally watch Milo. In practically every college they go to, there’s protests, chants during the speeches, fire alarms being pulled, people taking the microphone from them, these speakers even need armed guard and security guarding them. The case at Berkely was liberals beating on people who wanted to see Milo. When Liberal speakers go to colleges, there’s little to no protest. I haven’t heard of any case of this happening, so if you know one, kindly share it.
I feel that there wouldn’t be such a divide and hatred towards the opposite political party, if people just went to a speaker, regardless of whether or not they agree with their views, listen to what they have to say like a normal, civilised person, and ask questions when/if they do open panel, which from what I’ve seen Ben and Milo almost always do. Not sure about other speakers though.
What’s wrong with learning another viewpoint and questioning it? Why do they just shut it off completely?

Why do the very same people who preach tolerance of peoples views, lifestyles, and individuality act so intolerant of peoples views, lifestyles, and individuality, when those views and such don’t match what they agree with?