King was opposed to the Vietnam War. He believed that the war was immoral and unjust. He also believed that the war diverted resources from the fight for civil rights. He expressed his opposition to the war in a number of ways, including through speeches and public demonstrations.
In a speech delivered in 1967, King said, "I oppose the war in Vietnam because I believe it is morally wrong. It is a war that has been waged for too long, and at a great cost to human lives and resources. It is a war that has escalated to the point where it has become a threat to the entire world."
King also said, "I believe that the war in Vietnam is diverting resources from the fight for civil rights in America. We are spending billions of dollars on the war in Vietnam, when we could be using that money to build schools, hospitals, and housing for the poor. We could be using that money to provide jobs for the unemployed. We could be using that money to improve our educational system."
King's opposition to the Vietnam War was controversial at the time. However, it is now widely recognized that he was correct in his assessment of the war. The Vietnam War was a tragic mistake, and it caused great suffering to the people of Vietnam and the United States.