Just a guess but ... I suspect he is trying to universalize the smaller, but more vocal progressive or more liberal wing of the Democrat Party, which did indeed oppose the Viet Nam War, as being the actual party in power, which it was not. I can't imagine any Republican considering Pres Johnson, or Sec McNamara, or Gen Westmoreland as being soft on commies or the war effort.
ignorance is the enemy
without equality there is no liberty
Get off the crazy train!!! ... dump Trump