Actually, up until many started dying off, a huge number of Vietnam veterans visited Vietnam for purposes of reconciliation and understanding, and they were and are heartily welcomed there. You may not choose to gain an understanding of the whole ugly situation from 1954 to the present, but I have read dozens of books and have watched dozens of documentaries and other portrayals of the conflict from many sides. I have seen the recreations of the booby traps they used on our soldiers the tunnel systems, and many more things over there you probably couldn't handle seeing.
And FYI, when I had a cousin proudly proclaim he was one of the "activists" who spit in returning vets' faces and called them "baby killers", I spit back in his face and asked him how he liked it. Don't impugn me as some pro-communist peacenik. It was not the fault of the soldiers who were basically kidnapped by LBJ and later Nixon to experience this hopeless ordeal.