US congresswoman Loretta Sanchez does not understand Vietnam and her country's history, says Len Aldis, a Briton who has followed the situation in Vietnam for years.

"Unfortunately, Sanchez is yet another person who fails to understand history, not only of Vietnam but also of her own country," Aldis, Secretary of the Britain-Vietnam Friendship Society, remarked on US congresswoman Sanchez's preposterous statements on democracy and human rights in Vietnam.

US congresswoman Sanchez on her recent visit to Vietnam joined the chorus of visitors from the US who are critical of Vietnam, the Briton man said.

He reminded that Martin Luther King's powerful "I have a dream" speech reverberated around the world in 1968, emphasising that "Was it that long ago that black citizens of the US were not allowed to sit in the front of buses?"

Aldis said being born in 1960 Sanchez was three years old when President Kennedy was assassinated in 1963, as was his brother Robert in 1968. He observed that a year after Sanchez was born the US forces began the spraying of chemicals including Agent Orange on Vietnam and she would have been 11  when the spraying stopped.

The Secretary of the Britain-Vietnam Friendship Society questioned if Sanchez visited any Peace Villages in Hanoi or Ho Chi Minh City during her recent visit; if she visited any children affected by Agent Orange; if she spoke to any organisations campaigning for justice for these tragic victims; whether she would be outside the Court of Appeals calling for justice for the victims of Agent Orange in June; and whether she, in Congress, will improve their human rights.

Aldis stressed that "I am not a religious man; perhaps ambassador Marine and congresswoman Sanchez are, let me end with a quote they may know, it is a quote worth keeping in mind before preaching to others: Let he that is without sin, cast the first stone".