The quirk of authoritarianism often promotes most the most "confident". The most confident of all is often an idiot simply because his confidence is from being too stupid to realize how wrong he is.
Spite is a powerful force in American politics. When forced to desegregate many white communities chose to close community pools and remove drinking fountains instead. They were happy to suffer so long as those they hated suffered too.
That too is about memes, the memes of Rome living on when it should have died long ago. Decolonization begins with decolonizing oneself and language. End the occupation of the mind and you can then begin to free others too.
Oh, but the horror of education... people thinking for themselves... believing they have rights. The GOP stands for the idea that only "some" lives matter, and that number is rather few, too.
Certain theologies expressly cater to them, too.... Personally I am not bothered by an elderly lady clutching her Rosary beads for comfort, but the young proselytizing evangelical I will set bear traps out for.
I simply do have to note that most political assassinations do have "unintended consequences", both the successful and unsuccessful ones. Best example was that Austrian Archduke.