I would hold them responsible if they would have sabotaged rescue efforts. Did the Rabbonim do that? Did they declare that no one should escape?
The first four pages dealt with this so I have no reason to think this will change anything. One famous Rav is knows for having advised people not to go, up until a certain point. Many others understood what was coming before the activists.
People didn’t leave because people have inertia. Nobody advised my grandparents not to leave, and yet he left the last minute. It wasn’t even possible for many to leave.
And yes, there were Baalei Ruach Hakodesh who foresaw and spoke about what was coming. Did people just get up and go? It is a gross misrepresentation to say that they held people back. Before the trouble started people were indeed advised not to go to America where they will drop Yiddishkeit. That was the truth, not an intuition. And still, many came, with their rabbi’s blessings.
Yirmiyahu Hanavi knew about the Cchurban and all the deaths, why didn’t he get everyone to run away?
What kind of scenario are you depicting where a zionist leader would advise people that things are fine and that people stayed because of him? If he knew better but wanted to pacify the masses then yes, he is to blame. If those who decided to listen to him rather than to someone else ended up suffering, that wouldn’t be any different than any other advice that didn’t work out. If you don’t know you can only calculate. And a single extreme situation doesn’t prove anything about the ability to calculate.
The Sanhedrin made a mistake by being Mattir Tzidkiyahu’s Neder. Reb Zecharya Ben Avkilus made a mistake by having Rachmanus on Bar Kamtza. Yehoshua was fooled by the Givonim. Moshe Rabbeinu made a mistake by allowing the Meraglim, does that justify the calling of Atem Hemitem?