Why is it ignored that President Harry S. Truman was a member of the Ku Klux Klan?

Answer 1

There were actually five presidents that were reportedly KKK members. President Warren G. Harding, President Woodrow Wilson, President McKinley, President Calvin Coolidge, and President Harry S. Truman. (It should be noted that historians at the Coolidge Presidential Library vehemently deny that he was ever a member; and the evidence about Harding is mainly based on rumor and innuendo, rather than documentable facts.)

The story in the case of Harry Truman, he was not really a very active member. He originally saw them as a patriotic organization, which was often how the Klan advertised themselves. Truman had a falling out with the Klan when he was confronted with their actual views; he openly spoke out against the group, and had death threats made against him for doing so. Truman's family denies he was ever a member, although the Klan has presented paperwork. There are many that feel the paperwork was falsified. I am thinking that it is not so much that it is ignored, but since it is not a concrete fact, it remains little known.