Sharpton worked for Brown in the 1980s. Cornell is a wannabe Marxist who resents capitalism.
The Black Panthers were against James Brown because he was a capitalist.
James saw nothing wrong with capitalism. He was a hard working man, a self-made man, and wanted to benefit from the rewards of his hard work.
He may have endorsed Humphrey, by he played the Nixon inauguration in 1969.
Like the title of his song said, I Don’t Want Nobody to Give Me Nothing (Open up the Door I’ll Get It Myself)