In truth, this is not a new theory and was long preceded by more detailed accounts by figures like Carl Bogus who wrote the 1998 work
The Hidden History of the Second Amendment. Carl T. Bogus,
Race, Riots, and Guns, 66 S. CAL. L. REV. 1365 (1993). These works are worth reading as are the writings of my colleague Robert Cottrol (and my former colleague) Ray Diamond. See Robert J. Cottrol & Raymond T. Diamond,
Bogus highlighted the quotes used later by Anderson, including a
warning by Patrick Henry that the Constitution gave too much power to the federal government in the “common defense” and did not leave enough powers with the states to defend themselves. Bogus asked “What was Henry driving at? In 1788, Americans did not fear foreign invasion. Nor did Americans still harbor the illusion that the militia could effectively contest trained military forces.” His answer was slavery and its preservation.