"The students allege that the elected representatives indulge in bullying, flout norms and affect studies," he said.
The professor said not all universities have unions like the one in JNU, "where students talk about real issues".
In absence of a students union, students can approach leaders of Subject Associations in all departments, he said.
"Besides, the Dean of Students Welfare also handles issues of students in an effective way. What is the purpose of having a union if a mechanism for grievance redressal is already there," asked another student.
The vice-chancellor had recently constituted a five- member committee to talk to the protesting students.
Supporters of the union said a genuine union would not indulge in violence.
"Opposing the union is undemocratic... People have a preconceived notion that elected representatives indulge in hooliganism... It all depends on what kind of a union is elected," said a representative of Dayar-i-Shauq Students Charter.
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(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)