How do you think this relates to the 1st Amendment?
And, being a site where hitlerisms are not casually bandied about is a good thing, IMHO.
And, just going to put this out there - comparing DT to hitler is just wrong. Just flat wrong.
You are, of course, correct. He who shall not be named served in his country's army in the first World War, had a plan for what he wanted to do and shared it well in advance, and, iirc, never married, unless you count wedding Eva Braun at the last minute.
There are other salient differences as well.
However, the mindset of the angry populations which supported the two are a more fertile basis for comparison. I do not think it is the person who becomes dictator so much as the crowd they please, and unfortunately, angry mobs change direction like a cattle stampede. The German people were angry, frustrated, commonly unemployed, and economically injured. The productive class in America is much the same. Both are angry at government and the chattering classes for the problems they face every day. Both have their scapegoats. There are many other parallels I won't go into here, but suffice it to say that those who seek the adulation of an angry crowd will do angry things to keep that adulation. That thirst for 'vengeance' is never slaked once whetted, and only grows. That is what makes things dangerous out there.