Here's the problem.
Ultimately, Jane Fonda was right. The war in Vietnam was a terrible idea and almost no one today actually claims otherwise. Democrats blame Ike and Nixon, Republicans blame JFK and LBJ. No one really wants credit for the policy.
If it weren't for protestors like Fonda, the Vietnam War would have dragged on for decades like Afghanistan did (where no one really questioned it because everyone involved was a volunteer and the rest of us meekly "Supported the troops" without questioning the policy.)
Despite that, Fonda became Box Office Poison by 1985 when Americans settled into their own version of the Dolchstoßlegende and concluded that we "lost" Vietnam not because we were trying to impose a government on the Vietnamese they didn't want, but because the hippies stabbed the brave troops in the back.
This is quite a bit different than merely apologizing for 400 years of slavery and Jim Crow. Merely apologizing isn't enough, we need to do something to make it right.