> I don't see how you can equate US forces in Vietnam with Ukraine considering peace talks to end the war in their country.
Why? What makes peace negotiations in Vietnam (1968-1973) different from peace negotiations in Ukraine, and how is it relevant?
> If the US invaded Mexico, he would presumably consider the US invasion a war crime but might still consider Mexico making concessions their best course of action.
Well, he didn't call for negotiations or any concessions or from the Vietnam side, instead explicitly called for unilateral pull-out of US forces.
Why? What makes peace negotiations in Vietnam (1968-1973) different from peace negotiations in Ukraine, and how is it relevant?
> If the US invaded Mexico, he would presumably consider the US invasion a war crime but might still consider Mexico making concessions their best course of action.
Well, he didn't call for negotiations or any concessions or from the Vietnam side, instead explicitly called for unilateral pull-out of US forces.