He literally says "most people" when he's talking about himself, cause he incorrectly assumes he's the smartest in the world. Therefore if he just learned something, then everyone else must not know that either.

He's like a toddler and doesn't understand theory of mind.

https://en.wikipedia.org/wiki/Theory_of_mind

Any time he says most people don’t know x it can be safely translated to I just learned x

Wait that a real quote?

And "We'll see." means don't press him for furthers details about his obvious lies.

The reason he uses so many weasel words is that he is a weasel

he's profoundly dum.

You fool, you absolute moron. It's written 'dub' not 'dum', have you not heard the presidemb?

He did say that. I heard him.

In my head I always substitute 'your country' with 'the Führer' in that quote because it's funny and because it illustrates quite well that the call to blindly support your country plays perfectly into a certain play book