It's not a burger thing. The war has affected two generations of people. It has been the justification for many actions. There is hardly a person unaffected in some way.
Now add in the optics of it, the optics of what they thought would occur not what did, a smooth pull out, on the exact twentieth anniversary of a day that has lived in truest infamy. A day the majority of the voting populace has seared into their minds. The ability to say, "I am the one who did it".
Now add in the obvious media fanfare, wall to wall coverage. Extol the great things soldiers did, the true evil we 'quashed', build it into a patriotic fervor.
All of this centered on a time of immense darkness when people are afraid. Give them a shining ray of hope, and joy, and the removal of a dark cloud.
It's not just that it would end, it's the context in which it ends.