Ayers claims the Weather Underground bombers were a way of resisting the war in Vietnam.

Ayers is SO FULL OF SHIT.

The vast majority of the Weathermen bombings occurred AFTER THE U.S. HAD ALREADY PULLED OUT OF VIETNAM.

Here is a timeline of some of their violent actions (via Wikipedia, but it's accurate):

May 18, 1973 - The bombing of the 103rd Police Precinct in New York. WUO states this is in response to the killing of 10-year-old black youth Clifford Glover by police.
September 28, 1973 - The ITT headquarters in New York and Rome, Italy are bombed. WUO states this is in response to ITT's alleged role in the Chilean coup earlier that month. [NYT, 9/28/73]
March 6, 1974 - Bombing of the Dept. of Health, Education and Welfare offices in San Francisco. WUO states this is to protest alleged sterilization of poor women. In the accompanying communiqué, the Women’s Brigade argues for "the need for women to take control of daycare, healthcare, birth control and other aspects of women's daily lives."
May 31, 1974 - The Office of the California Attorney General is bombed. WUO states this is in response to the killing of six members of the Symbionese Liberation Army.
June 17, 1974 - Gulf Oil's Pittsburgh headquarters is bombed. WUO states this is to protest the company's actions in Angola, Vietnam, and elsewhere.
July, 1974 – The WUO releases the book Prairie Fire, in which they indicate the need for a unified Communist Party. They encourage the creation of study groups to discuss their ideology, and continue to stress the need for violent acts. The book also admits WUO responsibility of several actions from previous years. The Prairie Fire Organizing Committee (PFOC) arises from the teachings in this book and is organized by many former WUO members.
September 11, 1974 – Bombing of Anaconda Corporation (part of the Rockefeller Corporation). WUO states this is in retribution for Anaconda’s alleged involvement in the Chilean coup the previous year.
January 29, 1975 - Bombing of the State Department; WUO states this is in response to escalation in Vietnam. (AP. "State Department Rattled by Blast," The Daily Times-News, January 29, 1975, p.1)
June 16, 1975 - Weathermen bomb a Banco de Ponce (a Puerto Rican bank) in New York, WUO states this is in solidarity with striking Puerto Rican cement workers.

EVERY SINGLE ONE of these bombing happened AFTER there were no longer any US fighting troops in Vietnam. And most of them were by the Weather Underground's own communiques unrelated to Vietnam. They were just trying to start a communist revolution, period.