Hard to say where he really sits without knowing more about him, but voice wise it seems he was calling for people to protest Israel's actions while not performing them specifically at Jewish events. Which I get. Bringing the protests to specifically Jewish events in the U.S. isn't protesting Israel, it draws the idea that if you are Jewish you are Israel, which is false. His comments that Palestinians should be able to live without fear I haven't seen anyone mentioning and the fact that they are quoting him from 2021 saying Israel should be more surgical, 2 years before things escalated from the Oct 7th attack and prior to any ground invasion.
A U.S. Senator speaking about Israel overreach in 2021 is actually surprising.
According to the article it says it requires only 51 votes to override. So "real" or not if the Republicans actually fall in line like always it once again doesn't matter what the Democrats in the Senate do. There are more than 51 (53) Republican senators, also Vance would vote for it. So they can have 3 people not vote for it and it would override it apparently. I thought the parliamentary would require 3/5 to override, but maybe that only pertained to some of the clauses they took out to ensure it did not require 60+ votes