Palestinian President Mahmoud Abbas condemned the killing in Tehran of Hamas leader Ismail Haniyeh as a “cowardly act” in a statement issued on Wednesday. The head of the Palestinian Authority described the killing as a “dangerous development.” The secretary general of the executive committee of the Palestine Liberation Organization (PLO), Hussein al-Sheikh, wrote on the platform X that his organization denounced “the assassination of the head of the Political Bureau, the national leader, Ismail Haniyeh.” “We consider it a cowardly act, this pushes us to remain more steadfast in the face of th…