The backlash against carpetbaggers refers to the strong negative reaction and resistance faced by Northern opportunists who moved to the South during Reconstruction, often viewed as exploitative and manipulative. This sentiment was fueled by the perception that carpetbaggers were taking advantage of the South's post-war turmoil to gain political power and economic wealth, leading to widespread animosity among Southern whites. The response contributed to the social and political tensions that characterized the New South era.