This idea of not being able to use Zionist as an insult is really not the core issue.
The core issue is discrimination and violence.
From an anti-Zionist website's coverage of this:
"For example," the document details, "excluding Zionists from an open event, calling for the death of Zionists, applying a 'no Zionist' litmus test for participation in any NYU activity, using or disseminating tropes, stereotypes, and conspiracies about Zionists (e.g., 'Zionists control the media'), demanding a person who is or is perceived to be Jewish or Israeli to state a position on Israel or Zionism, minimizing or denying the Holocaust, or invoking Holocaust imagery or symbols to harass or discriminate."
Again, a reminder *this is from anti-Zionists saying what they find unacceptable in the new policy*.
Saying that this is about "insults" really diminishes the far more serious issues.
#Zionism