In 1952, whilst in prison, al-Haidari rebelled against the adoption of a new party programme of the Communist Party. Al-Haidari, along with other critics of the new party leadership, were expelled from the party. In February 1953, after the Communist Party organ al-Qaidah had published a ferocious attack on the expelled dissidents, al-Haidari's group decided to form a new organization, named after its organ Rayat ash-Shaghilah ('Toilers Banner').