The March from Selma to Montgomery was designed to dramatize the need for the Johnson Administration to pass a Voting Rights Act.
Granger laws were declared as an unconstitutional because they tried to have control over the interstate commerce, which was the federal government's responsibility by Gibbons v. Ogden. Granger Laws were laws that were passed in multiple midwestern states in US. These states include Iowa, Minnesota, Illinois, and Wisconsin.
He was referring to the American citizens that didn’t participate in the protests against the Vietnam War
