In what year did World War II start? Depends on the country, for the USA was 1941, for Poland was 1939 but the indicators can be traced well into the 1920s.
Yes, he is, Trump is indeed mimicking Hitler, even if by coincidence. But I would be very skeptical about that, because at some point it stops being a coincidence.
Did you know that a lot of authoritarians and tyrants were duly elected, and then they just decided never to leave – or installed a puppet government? Indeed.
Authoritarians are only as strong as their followers, but did you know that authoritarians actually weaken and exploit their own followers? Indeed, they do.
There are actual courts of law, and for some reason a more influential court of public opinion. Former US President Trump is in court for many actual crimes.