The leftists took a big PR hit by spitting on and reviling American troops during and after VietNam, so now they're pretending to be their friends.
It's worth pointing out that their actions make our troops lives and jobs more dangerous by giving hope to our enemies. And that nobody wearing a uniform is fooled by leftist claims of "support."
Yes, I think I remember seeing an interview with Chicago 7 member Jerry Rubin (Later Leftist Yuppie!) who conceded it was a huge mistake to yield the American flag symbology to the Right.
What he wasn't intellectually honest enough to admit is that since they hate America it was natural for them to yield the American flag to the right.
Regards,
TS