"Some people at the school felt the mural didn't accurately represent many students at Pilgrim and school officials decided to paint over the right side."
The "normal" marriage of "normal" people is depicted on the right side of the mural.
But this "normal" part is removed so as not to upset those who "change the natural use of women and men" in marital relations.
But of course that is not discrimination?
Rom 1:26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature: 27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another"