The man who smuggled himself into Auschwitz

I think this was a bit more complicated:

From http://en.wikipedia.org/wiki/Jan_Karski

In the summer of 1942 Karski was chosen by Cyryl Ratajski, the Polish Government's Delegate at Home, to perform a secret mission to prime minister Władysław Sikorski in London. Karski was to contact Sikorski as well as various other Polish politicians and inform them about Nazi atrocities in occupied Poland. In order to gather evidence, Karski was twice smuggled by Jewish underground leaders into the Warsaw Ghetto for the purpose of showing him firsthand what was happening to the Polish Jews. Also, disguised as a Ukrainian camp guard, he visited what he thought was Bełżec death camp.[2] (It is now believed that he actually saw a nearby sorting camp of Izbica)

In 1942 Karski reported to the Polish, British and U.S. governments on the situation in Poland, especially the destruction of the Warsaw Ghetto and the Holocaust of the Jews. He met with Polish politicians in exile including the prime minister, as well as members of political parties such as the PPS, SN, SP, SL, Jewish Bund and Poalei Zion. He also spoke to Anthony Eden, the British foreign secretary, and included a detailed statement on what he had seen in Warsaw and Bełżec. In 1943 in London he met the then much known journalist Arthur Koestler. He then traveled to the United States and reported to President Franklin D. Roosevelt. His report was a major factor in informing the West.

In July 1943, Karski again personally reported to Roosevelt about the situation in Poland. He also met with many other government and civic leaders in the United States, including Felix Frankfurter, Cordell Hull, William Joseph Donovan, Samuel Cardinal Stritch, and Stephen Wise. Karski also presented his report to media, bishops of various denominations, members of the Hollywood film industry and artists, but without success. Many of those he spoke to did not believe him, or supposed that his testimony was much exaggerated or was propaganda from the Polish government in exile. It is possible, however, that Karski's descriptions influenced FDR to create the War Refugee Board several months later in January 1944.

=============

You can say allies did not care, Poles were antisemitic, but there are Jews on the list of people he contacted.

In addition to viraptor's post. I want just add that for sure some Poles we're anti-Semitic. But labeling whole nation like this is a terrible mistake, which lead humanity to at least one holocaust. In 1930 Jews were 11% of Poland's population. There we're 116 Jewish newspapers. In September 1939, around 120k Jews fight with Germans in Polish Army (as officers as well, please find officer in Whermaht or in SS) against Germans and Russians. All pow's with Jewish ancestors we're murdered by Germans :-/, only because they we're Jewish.

Well what my point is, you cannot say things like this, it's just wrong. You're harming a memory of wonderful and amazing cultural contribution.

I would gladly show you Łódź or Kraków in Poland, so you can witness with your eyes, how wonderful we're coexistence of Poles and Jews.

How is this relevant?

I've been mentally bombarded enough with WW2.

I agree. The story here is impressive, courageous, daring, and brash, but calling it a "great hack" doesnt seem fitting.

There is something that puzzles me in all this : why didn't he spoke of it earlier ? Especially since it's advertised that he did it "so he could tell others the truth".

Perhaps he spoke about it and it didn't catch media's attention.

Anyway, if it's true then it sure is very brave, and crazy. I mean infiltrating an extermination camp ? You gotta be insane (or suicidary) to try something like this.