The Ustaše recognized both Roman Catholicism and Islam as the national religions, but held the position Eastern Orthodox Church, as a symbol of Serbian identity, was their greatest foe. Although Croats were by far the largest ethnic group to constitute the Ustaše, the Vice President of the NDH and leader of the Yugoslav Muslim Organization Džafer Kulenović was a Muslim, and Muslims (Bosniaks) in total constituted nearly 12% of the Ustaše military and civil service authority.