The anti-war movement and the affiliation with anti-war folk singers started way before the Viet Nam War. Dylan's "Masters of War" was written in 1962 when we were in a period of relative peace. It cannot be an anti-Viet Nam War song.

"Feel Like I'm Fixin' to Die" is.

Also, Joe MacDonald was in the Marines in the 1958-60 vicinity and is not a Viet Nam War vetran. Jimi Hendrix was.