FYI The government side in the Spanish civil war was the side fighting against the Falangist right wing. Later, of course, the government was basically taken over by the Soviets. That was because they were the only nation furnishing arms to the Republic. The Republic experienced it's own nasty inetrnal war - Communists against other forces in the left and center. See George Orwell's "Homage To Catalonia".

About right wing folk songs: Fleming Brown (a good ol' left wing type) used to sing a song by a downstate Illinois miner - lyrics started out "Come and lsiten to my song/Story 'bout a nation wronged/lawless man in a roving band/strike the tools from a miner's hand. Flag of blue, white and red - man's got a right to earn his bread." Very definitely anti-UMW.