I thought that they decided instead of killing senators they were going to throw away their medals. Does it jive with the time frame.
Those were two different events.
Members of the VVAW threw their medals in Washington DC in April 1971 at Operation Dewey Canyon III, the protest at which where Kerry also told bogus tales of war crimes to the Senate. Scott Camil was evidently making noises about shooting people even then.
But at the November 1971 meeting in Kansas City, the VVAW leadership actually voted on a proposal to murder 6 or 7 U.S. Senators who supported the war. This appears not to have bothered John Kerry all that much...