Why did Vietnam veterans receive a cold homecoming?

Vietnam veterans received a cold homecoming due to widespread anti-war sentiment in the United States during and after the Vietnam War. Many Americans opposed the war, viewing it as unjust and unnecessary, which often translated into hostility towards returning soldiers. Additionally, the brutal nature of the conflict and the media coverage of it contributed to a negative perception of the military's role, leaving veterans feeling alienated and unsupported upon their return. This lack of recognition and appreciation for their service contrasted sharply with the warm welcomes provided to veterans of previous conflicts.