If there is an afterlife, I'm sure Hitler is looking on with glee at the inspiration and chaos he left behind -- his enemy, white America, however feebly, fighting for race; his other enemy, Russia, crippled, and at the same time able to trip up the US, in its own dream of a thousand-year American Reich.
He won't be happy with the Jewish power prominent in US-Israel, or the 'political correctness' of gender-bending. Perhaps he oppressed homosexuals because he was a self-hating one himself. Hitler was (probably) a virgin to the end, and Nazi gear is a popular gay fetish.
There was/is lots of homoeroticism in Nazism, which required a purge, the Night of the Long Knives in 1934, right up there with Kristallnacht for the Jews in 1938. All these 'subhumans' detracted from the glamour of the Nazi warrior culture, which survives today in little pockets (unless you consider the US army closet-Nazi), mostly attracting angry teens, erupting and quickly fizzling out.
There is no evidence of Trump's 'inner gay', no sexual skeletons in his closet at all. That is impressive, as one media icon after another is toppled today for what formerly was just business as usual, but is now scandalous behaviour. Trump can only think longingly of days of yore. His empire is getting duller by the day.
Trump (like Hitler), rightly or wrongly, sees the gender-bending craze as unseemly, disruptive of the macho steel fist he wants the US to exercise around the world. Are women and transgender soldiers good ambassadors abroad when invading other countries? Do they educate ignorant locals to American 'values'? Or just reinforce local resistance to the obscenity of invasion and destruction of their cultures by this legalistic individualism?
Hitler also wouldn't like Trump's disdain for nature. That is where Hitler was much better than Trump, at least in theory. The Nazi ideology of race was deeply tied to love of nature. The homeland was sacred. The Nazis ordered soldiers to plant more trees. They were (along with the Soviets) the first Europeans to establish nature reserves and order the protection of hedgerows and other wildlife habitats. And they were horrified at the idea of hydroelectric dams on the Rhine. Adolf Hitler and other leading Nazis were vegetarian and they passed laws on animal rights.
Trump's open disdain for the environmental movement puts him starkly at odds with the Nazi leader. Trump is no vegetarian. Land should be turned into golf courses or hotels. Rivers be dammed! The Nazis promoted the idea of a synthesis of rural and urban, "rurban" values (Arthur Schweitzer, Big Business and the Third Reich). The Nazis promoted the view that the class-struggle in the city could be overcome by returning to the villages and developing artisan and agricultural economies based on cooperation, by government control of land use.
'Aryans' needed to get back to the soil and simple life--Ideas that resurfaced in the West in the 1960s and still resonate.
But these socialistic plans fell to the axe of big business in the 1930s. Hitler also liked war, and knew who was paying the bill, so his environmentalism was largely discarded in favour of big business. Hitler's legacy in that regard is limited to vegetarianism, some trees and a few parks, though it lives on in modern Germany, and is still a model for the US to emulate in some post-Trump era.
History is notorious for repeating itself as parody (thank you Marx). We needn't fear Trump actually starting another world war. It's doubtful anyone will ever want to vie with Hitler as the ultimate monster. A counterfactual is tempting in that respect:
If Hitler had been impeached (and Stalin had left the German communists alone), the Communists would have taken over and the world would be a very different place. No war (certainly not WWII), relations between countries built on equality (at least not on conquest), lots of trees. If Trump is impeached, it means a free pass for the neoliberals and hawks under the wily Pence. A more boring version of what we have now. Where are those revolutionaries of yore today?