"insanity" - extreme foolishness; folly; senselessness; foolhardiness
In light of recent accusations of Donald Trump being insane, I hereby practice medicine without a license and diagnose the liberal media and Establishment politicians as being insane.
Actually, I'm using the non-medical use of the word as a definition and accusing them of doing, saying, and becoming exactly those things of which they accuse Donald Trump. For example, an August 3 Washington Post headline of an article by Greg Sargent proclaimed: "Republicans nominate dangerously insane person to lead America, then panic when he proves he's dangerously insane."