Holy crap, I can't even begin imagining the grief and anger that they must have felt.
On top of that, the irony of poisoning the water supply is thick, since Jews had been accused of poisoning wells for hundreds of years at that point[1].
[0]https://en.wikipedia.org/wiki/Nakba
[1]https://en.wikipedia.org/wiki/Antisemitic_trope#Well_poisoni...
-They didn't care at that point
(Not) funny fact: statements "not the same people" and "the same people" are considered both true at the same time.