The saddest thing is, a lot of those who voted for Trump did think his incoherent ramblings were harmless. How many people went shocked Pikachu face when they learned Trump actually put in tariffs? Or that heard his "dictator for a day" comments and brushed it off?
Somehow, a lot of people 1) heard Trump's ramblings, 2) assumed he was lying, and 3) they still voted for him, even while believing he was full of shit.