The article you cite appears to indicate that the harrassment, with the Admin's approval, was by students protesting "politcally incorrect" aspects of the play. That would tend to indicate that the perpetrators were not conservative, but more likely liberal.
You'll note, for example, that "many" of the protestors were African-American, and were protesting the use of the N word and other types of things. Unless WSU is a heretofore unknown stronghold for black conservative I would, therefore, suspect they were not conservatives at all.
