[thegreatbeast]

What Truman wrote does not constitute anti-semitism.

The suggestion that Truman was a Klan member is modified by the word "reportedly" suggesting that further proof is required.

The writing in this diary does seem posed and theatrical but I would think it was verified by the library staff.

[Enterprise]

Well, here's another source then.

During certain periods of the 20th century--in the 1920s and again in the 1950s--the KKK's active membership swelled to massive proportions, not just in the South but in rural areas of the North as well. In the 1920s Klan members held posts in the highest levels of the government--including two former presidents who were Klan members. In 1921 Warren G Harding was initiated as a Klan member at the White House, and Harry Truman paid dues as a Klan member in the 1920s, years before he was elected president.

http://pubs.socialistreviewindex.org.uk/sr176/smith.htm