I had three great uncles from MO who ran with Quantrill and a Great Grandfather (their father) who provided financial support. They were force to fight when Redlegs came onto their land and hanged their mother’s brother for absolutely nothing. Antifa are the modern Redlegs.
Missouri’s post-war constitution disenfranchised any resident who so much as mailed a letter to anyone in the CSA. That constitution was replaced in 1875.