Is Trump Hitler?
For the same reason as why Mussolini wasn’t Hitler and Franco wasn’t Hitler. No two fascists are the same; every country that falls down this hole gets its own unique horrorshow.
Is Trump as dangerous as Hitler?
He is much, much worse.
Hitler was leading a broken nation that was militarily matched by the Western Allies and outmatched by the Soviets. He had an intelligence apparatus based upon radio and typewriters.
Trump has the most ludicrously over-funded military in the history of the world, with global reach, instantly apocalyptic potential and no real competition. And an espionage apparatus that would have made Himmler cum in his pants.
If you aren’t scared shitless, you don’t understand the situation.