Monolithic assumptions about Islam enable guilt-by-association smears. [causal]
The assumption that Islam is monolithic easily lends itself to the guilt-by-association principle at work in the campaign to label Obama a Muslim and in much of the Islamophobic discourse one finds in the West.
Builds on: "Islamophobia stems from viewing Islam as monolithic and unchanging"
Green, Todd H, The Fear of Islam_ An Intro…, loc. 55