That's an unambiguous call for the overthrow of the United States government.
That's a death penalty crime, and he committed it right out in the open.
But, given that his 'comrades' have been gnawing at this country's vitals from within for several generations, it's not surprising that there's a degree of paralysis in the government he advocates the overthrow of.
Which begs the question...
What is to be done?
According to the Constitution, one can only be convicted of treason if 2 or more witnesses testify to the act.
Count me in ... are you willing to testify as well?