"The polemical attacks on Sufism by fundamentalists have had the primary goal of making Sufism into a subject that is separable from Islam, indeed hostile to it. This strategy permits fundamentalists to define Islam as they wish by selective use of certain scriptural texts." 
- Ernst, Carl W. The Shambhala Guide to Sufism. Boston: Shambhala Publications, 1997. https://amzn.to/2SoFmun. p. xiv.