Please see the related questions.
The state of Israel did not exist at the time: there was no Jewish country then and therefore no Jewish Embassy. Even if there had been, it is most unlikely that they could have stopped the Holocaust.
One cannot say seventy years later what should have happened: The US did what it could at the time.
Beyond contributing to the defeat of Nazi Germany, nothing. However, it's not obvious what could have been done, given that most bombing was not very accurate. Please see related question.
Remembering the one caused by Hitler
In effect the US did stop the Holocaust. By aiding the Allied victory, in defeating Germany, the Holocaust was stopped. If the US could have stopped it sooner, it is possible that they could have, but at great cost.
Anne Frank didn't stop the Holocaust. She just made a diary on the thing. The Allies stopped the Holocaust. Anne Frank was just a teenager during the Holocaust. She could not have stopped it. The above answer is correct. See link below for more information.
We should keep sensors in the to check the leakage
The US and other countries could have objected to Germany's persecution of Jews before the war. The fact that they did not led Germany to believe that it could do whatever they wanted without interference.
The US and other countries could have objected to Germany's persecution of Jews before the war. The fact that they did not led Germany to believe that it could do whatever they wanted without interference.
because no one objected to their anti-Jewish measures in the thirties, no one took in the Jews when they could and no one tried to stop the Holocaust.
You can't.
kill the poachers