Was john denver a devil worshiper?

NO! He is a great disciple of the Source himself! His songs are filled with hidden meanings and great sayings. If you listen closely then you can discern his wonderful riddles of spirituality.

No, he thought religion (god and devil) was just a superstition.

Henry John Deutschendorf, Jr. (December 31, 1943 - October 12, 1997), known professionally as John Denver, was an American singer/songwriter, activist, and humanitarian. After growing up in numerous...

Due to numerous infidelities on Denver's part, his wife of many years, Annie, asked for a divorce in 1982.

Yes, he had girlfriends after 1993 but they weren't discussed publicly.