Pro-Israel in what sense? Believing that Israel shouldn't exist is an extreme opinion that isn't widely shared in the western world. The debate is about a homeland for Palestinians.
Believing that Palestinians shouldn't have a homeland with safety and rights is an extreme opinion not widely shared in Pro-Israel world, they just aren't delusional about the security implications.
I'm serious. What does Pro-Israel mean in this context? Most of the western world is Pro-Israel as in pro Israel's existence. An Anti-Israel speaker would be extremely controversial.
Look at what happened when Ahmadinejad came to Columbia University.
I guess in this context, as referenced in the parent article, anyone who isn't anti-normalization/ doesn't support BDS.
Guess it's a point of view thing. They say "lift the evil Gaza blockade," Israelis/Many Jews hear, "We don't give a flying fuck if you and your families get killed by terrorists."
The term "anti-Israel" is used extremely often in North America to refer to things that are not "pro-Israel". For example John Kerry's speech about the occupation and why it is in Israel's best interests to end it.
Large segments of media here branded that as an "anti-Israel" speech even though it wasn't questioning existence of Israel: