People having different opinions than yourself doesn't mean civilization is about to collapse.
EDIT: Perhaps this is your idea of a university nowadays (enable subtitles): https://youtu.be/watch?v=7C_qJnd5fT8
Read about Soviet dekulakization, and ponder how that could've happened. It started with "this whole society, the shoulders of which I now stand upon, is wholly bad and corrupt, irreversably, nose-to-tail, and we must destroy it all (so that nobody else can gain the influence over society that I have achieved)."
When you believe that the only moral position is for "your side" to hold power, and to use it against the other side, you'll justify any atrocity.
Likewise today: improvements in quality of life have stagnated in huge parts of the world, wages are falling in real terms, inequality rises to Gilded Age levels, democracy is backsliding. Is it any wonder there is "resentment"?