When You Comin' Back Red Ryder? Why Douriff Didn't Want To Reprise Role In Film?

Brad Dourif played the role of Stephen in a stage production of the play. Dourif was asked to reprise the role for the film, but turned said offer down because he didn't want to work with Marjoe Gortner.

Does anyone know why this might be?

I can't find any info during a brief internet search.