At the end of WWII, Jewish people had a lot of healing to do, and for a select few, this involved revenge on those who inflicted such atrocities on them and their families. The Nakam, which roughly translates to "The Avengers," was a group of Jewish rebels who originally called themselves the Nokmim. This group operated during WWII, blended with British Jewish Brigade veterans, and came together to exact revenge on those they deemed responsible for the Holocaust. They were - in part - the inspiration behind the 2009 film Inglourious Basterds.
Some German soldiers had rich lives after the conflict, and there are still rumors the Fuhrer himself survived and hid out in Argentina. Very few in his regime were legally prosecuted, so the Nakam took it upon themselves to pass judgment and sentencing.
While the overall plan was revenge, famous Avenger Joseph Harmatz expressed a more specific goal. He told The Observer of Britain in a 1998 interview: "Our ultimate intention was to [terminate] six million Germans, one for every Jew [felled] by the Germans."
Recognizing this desire to exact perfect revenge on the Germans, it makes sense why the Nakam had few qualms about carrying out Plan A, an extensive and ambitious plot that would have taken the lives of numerous innocent German civilians.
The Nakam had two major strategies: Plan A and Plan B. Plan A never came to fruition for numerous reasons: the bottom line is that it was a horrific idea because it would have taken the lives of innocent people. Some members of the Nakam thought the only path to perfect revenge would be inflicting the same fate on German citizens that German soldiers did on the Jewish people.
The plan was to poison the water supply of five major German cities: Hamburg, Berlin, Munich, Nuremberg, and Weimar. Abba Kovner, creator of the Nakam and mastermind of Plan A, was detained with the necessary materials to get the job done on him, with speculation that he was outed by those who feared the plot would ruin the Jewish people's right to a new homeland in Israel.
Once Plan A was foiled, the Nakam concocted a less expansive plan: take down 12,200 SS guards being held as prisoners. Joseph Harmatz led the scheme, which took place in April 1946. The Nakam managed to taint 3,000 loaves of bread thanks to member Arye Distel who had infiltrated a local bakery.
Although this plan went forward, it was unsuccessful in that it wasn't fatal. Roughly 2,200 prisoners got sick, but the exact number of fatalities was not recorded, and according to investigators it might not have resulted in any. Some theories indicate the former soldiers suspected the bread was compromised, and didn't eat enough for it to matter.
Plan A was a concept of what the Nakam were ready to do to exact their revenge — and it's possible this plot, along with the secondary, slightly more successful Plan B, was approved by Chaim Weizmann, none other than the first President of the state of Israel. Kovner allegedly told Weizmann about the Holocaust, and Weizmann was reportedly so upset he gave the Avengers his blessing to exact revenge on the Germans.
However, numerous sources claim Weizmann had no knowledge of Plan A, and was only on board for Plan B.