In the play the Indians kidnap Mary.There is a threat of rape before she is rescued. Thee were also complaints that the play portrayed Indians as other than modern people. The protrayal of Indians as anything other than peace-loving, wise, kind, etc was “racist”.
It was the HS play that year and was banned from the HS stage after the demonstrations. A community group bailed them out and it was performed on a private stage in a restored movie theater.
There isn’t that much left up on the web, but here is a google search page: