The White Paper of 1939 was the British decision to forbid European Jews from immigrating to Palestine, in order to save themselves from the European socialists, because the Brits did not want to disappoint the Arabs. Even though the British had promised to help the Jews create a state of their own in Palestine (Israel+Jordan) in 1917 (Balfour Declaration).
Initially, Hitler did not want to kill the Jews of Europe. He was simply confiscating their wealth and he was throwing them out of the countries he conquered. The Arabs asked him for the Final Solution, because the Jews had nowhere else to go, and they would end up in Palestine.
Therefore the Holocaust can be seen as a byproduct of the English-German rivalry about who was going to win the Arabs as allies. Remember there was a war for the oil of the Middle East going on between the allies and the nazis. That’s probably why the British never bombed the concentration camps, even though they knew what was going on there. They knew they would disappoint the Arabs.
“White Paper 1939”
Today things are almost the same. England is buying a lot of gas from Qatar, and Qatar is heavily investing in England. Jeremy Corbyn represents the new anti-Semitism. The truth is that Jeremy Corbyn is a lot more “enthusiastic” about the Jews than the British were during WW2. During WW2 the British contributed indirectly to the Holocaust by following the realpolitik, and not by anti-Semitism.
See also “Hitler, Netanyahu and the Grand Mufti of Jerusalem”.