The MOU was no more an overthrow than people proposing any policy.

IF protesters request the government set up a community oversight board for the police or build a playground, that wouldn't not be overthrow either.

I have seen the MOU linked several times, but nobody has ever made a coherent argument how it constitutes treason, overthrow, or anything else of that nature.

It is a simple list of demands from protesters, primarily that the government drop vaccine mandates and vaccine passports.

The protestors wanted the "Federal Government" to enforce their versions of laws in the MOU or they were to resign, and were prepared to take over by force if the MOU was not signed or their demands were not met. They wanted to have their own January 6 moment, but in Canada this time.

None of that is supported by the document you linked.

It is just a list of demands. Is it a insurrection any time a protester makes a demand?