“Nakem” means “revenge” in Hebrew. They planned to poison water mains to achieve their goal, but were thwarted by police. Later, they poisoned thousands of loaves of bread which were actually consumed, resulting in widespread illness, although no deaths are known to have occurred as a result.
I dont trust any of these “hunters” tbh. They are fanatic in the first place (otherwise they wouldnt hunt or take revenge on nazies) and that means they dont have the mental fortitude to make proper judgement over peoples involvement in certain conduct.