After John Sigismund's conversion, most of his courtiers also adhered to Unitarianism. According to historian Gábor Barta, political factors also contributed to John Sigismund's conversion, because he "found in [Anti-Trinitarianism] the means through which he could express both his adherence to the Christian world and the distance from it". István Keul says that the simplicity of the idea that "There is but one God!" also contributed to the spread of Unitarianism, especially among the Székely villagers and the townspeople of Kolozsvár. A religious enthusiast, György Karácsony, stirred up many peasants in Partium to wage holy war against the Ottomans in 1569. They marched against Debrecen, but the neighboring noblemen routed them near the town in early 1570.