Because that's what a fear monger does.

Don't listen to it then.

By the way the, UK isn't the same as the US, our problems aren't necessarily the same as yours.

He started the "Heterodox Academy" which argues for and promotes ideological diversity (i.e. both left and right) in universities.

Below is a quick dirty quote from Wikipedia.

In chapter 8 of The Righteous Mind, Haidt describes how he began to study political psychology in order to help the Democratic Party win more elections. But in chapter 12 of The Righteous Mind Haidt argues that each of the major political groups – conservatives, progressives, and libertarians—have valuable insights and that truth and good policy emerge from the contest of ideas. Since 2012 Haidt has referred to himself as a political centrist

FTFY