Side A of the political spectrum traffics in hate and division as its primary organizing tactic for decades until the nation is is fact ripped apart. Then it goes truly insane and becomes an existential threat to the nation if not the world. They line up in lockstep behind Mango Mussolini as he tries to rend the nation limb from limb. Side B of the political spectrum panicks and responds in kind, for which they are pilloried by Side A.
This ain't surprising at all.
https://medium.com/bigger-picture/inheriting-a-broken-politics-3cd53cfc5ea9