"history is a guide to what works" is self-explanatory.
In this instance: The republicans wanted America to go fascist.
America didn't; we went Allied in WWII.
Republicans analyzed why Germany went fascist.
Republicans determined that hitler exploited economic insecurity.
Republicans spent a couple generations consciously destroying the American economy and middle class to create economic anxiety they could exploit by giving the now-broke white idiots scapegoats to hate on.
And the reason every right wing fucktart in the world hates on immigrants is /because it works/. It's why America blew up the middle east. By the year 2000, Europe's social democracies were forging ahead of us by a couple generations. Flooding them with refugees worked well. Their right wing was empowered and put the brakes on all that sustainability and social justice they were developing. We know this works because we've kept everybody south of our border as a failed state for a century, at least, in order to provide an endless supply of political props coming in illegally in a desperate attempt to survive.
History is a guide to what works. It's why it rhymes. You do realize the people with all the power read their Twain and Orwell and Huxley as well as us peasants pushing back, right?