The committee wasn't looking at whether he broke rules or not, stupid or otherwise. They were looking at whether he lied and deliberately misled Parliament, which he did several times as PM.
Unless you like your leaders to lie and deliberately mislead you, you shouldn't like the conclusions of...
James Fenimore Cooper in 1838 identified four fundamental characteristics of demagogues:
They present themselves as a man or woman of the common people, opposed to the elites.
Their politics depends on a visceral connection with the people, which greatly exceeds ordinary political popularity...