As I see it, the Internet has created two problems:
(1) Everyone now has a voice -- yeah that's cool but society isn't handling it too well yet
(2) It's now easy to associate with people who think like you -- cool but absolutely terrible
What happens is that now a bulk of the things you hear come from your own circle (which is self affirming!) and then when you hear something from outside your circle, it feels so far off that it causes you to react violently (a.k.a. you want to cancel them).
The problem is: you can't get rid of that violent reaction. It's natural and human to dislike things that you're unfamiliar with. (Actually I think every living thing is like that -- being wary of unfamiliar things is essential to survival.)
So the only thing you can do is desensitize yourself by hanging out with a diverse set of people. I don't know how we can make society as a whole do that more, but the Internet is allowing some people to do it a lot less.
To make matters worse, before when it didn't matter if Jane or Frank were totally clueless, it matters now because because Jane and Frank both have a voice and can tweet about it.