I agree that Hitler comparisons often muddy the waters. However, the psychological parallels are simply too striking to ignore. 

Proposing that the fact Trump has not yet taken office means we need to let him get inside and start wrecking the furniture before we pass judgement is tantamount to facing a monkey with a machine gun and waiting for him to start shooting before taking cover. And let us not forget, the Nazis came to power legally in 1933. It wasn't a coup-d'état either. 

Now we're urged to go gently into the night, hoping that Trump won't do what he said he was going to do: strong-arm companies (shades of Italy in the 20s & 30s), ruin the climate for our children to suffer, deport thousands, nay millions, of Latinos, put Americans under surveillance because of their religious affiliations, and cozy up to Vladimir ("thanks for hacking my opponents") Putin. 

And we thought George W. Bush was de-stabilizing - wait 'til Donald Trump gets his hands on the nuclear codes !