During the Second World War in Yugoslavia, as with the Catholic Church in Croatia, many Muslim clerics in Bosnia and Kosovo were willing accomplices in the genocide of the nations Serbian, Jewish and Roma population. From 1941 until 1945, the Nazi-installed regime of Ante Pavelic in Croatia carried out some of the most horrific crimes of the Holocaust (known as the Porajmos by the Roma), killing over 800,000 Yugoslav citizens - 750,000 Serbs, 60,000 Jews and 26,000 Roma. In these crimes, they were helped by Muslim fundamentalists in Bosnia and Kosovo who were openly supported by the Palestinian Grand Mufti of Jerusalem, Hajj Amin al-Husseini. A notorious anti-Semite, he openly encouraged Muslims to join Nazi units that would be later implicated in genocide and crimes against humanity - the infamous Hanjar (or Handschar) 13th Waffen SS division. One of these crimes was the The Massacre at Koritska Jama Gorge, in Bosnia during 1941. The Nazi's also established a puppet state in Serbia under General Milan Nedic, who along with the Cetniks also particapated in the Holocaust in wartime Croatia (which included Bosnia) and Serbia.