What is "Chrislam" as defined in the novel, The Hammer of God?

Clarke gives brief explanation of "Chrislam," a religion born of American contacts with Islamic culture during the Gulf war in the early 1990s, mixing premises of Judaism, Islam, Christianity, and Buddhism, and propagated rapidly and intensely through Brainman memnochip programs which can carry virtual reality experiences to the user's brain via a special neural net helmet.