Mother Jones reports:

Last week, legislators in Tennessee introduced a radical bill that would make “material support” for Islamic law punishable by 15 years in prison. The proposal marks a dramatic new step in the conservative campaign against Muslim-Americans. If passed, critics say even seemingly benign activities like re-painting the exterior of a mosque or bringing food to a potluck could be classified as a felony.

The Tennessee bill, SB 1028, didn’t come out of nowhere. Though it’s the first of its kind, the bill is part of a wave of related measures that would ban state courts from enforcing Sharia law. (A court might refer to Sharia law in child custody or prisoner rights cases.) Since early 2010, such legislation has been considered in at least 15 states. And while fears of an impending caliphate are myriad on the far-right, the surge of legislation across the country is largely due to the work of one man: David Yerushalmi, an Arizona-based white supremacist who has previously called for a “war against Islam” and tried to criminalize adherence to the Muslim faith.

Yerushalmi, a lawyer, is the founder of the Society of Americans for National Existence (SANE), which has been called a “hate group” by the Council on American-Islamic Relations (CAIR). His draft legislation served as the foundation for the Tennessee bill, and at least half a dozen other anti-Islam measures—including two bills that were signed into law last year in Louisiana and Tennessee.