Ferguson is a town of 21,000. You can figure the police department, at best....has around twenty-five members....counting the guys who run the jail-house. There’s not much you can do....and I doubt if stores had adequate insurance to cover this type of situation.
In most states --- even in Libtard New York -- you can use deadly force to stop someone from committing arson; burglarizing a dwelling place; or burglarizing a commercial business where the person exercising deadly force reasonable believes that his or her or another person's life is in imminent danger and safe retreat is not an option.
In 2000, Ferguson was 44.75% white. By 2010, it was down to 29.1%.
A lot of the potential lootees have already gotten out of Dodge. The rest will follow shortly.