As it was established by Nixon’s Southern Strategy it’s totally about preserving power (which they use for the highest bidders). Anger and hate keeps their base voting for them.
But their base is fickle, which is now Donald Trump seized the 2016 Republican Primary from everyone else. And while Trump is facing all his indictments and other player like DeSantis vie to take his place, that base will eventually find another Secret Hitler to fall behind.