My suspicion is that if such a thing were attempted the guards would carry out their orders to massacre all the prisoners.
I suspect that you are correct.
Certainly a possibility. But I can’t see them being important enough to take the PR hit from killing them.
In fact, I can’t see the importance of continuing to hold them. If’n I were Joe Biden, I’d pardon ‘em all and send ‘em home.
That would stick a pin in our side.