“In 1894, historian Theodor Mommsen wrote that the root cause of the anti-Semitic ‘affliction’ was ‘envy and the basest instincts,… a barbaric hatred for education, freedom, and humanism.”

Ibid.
"The Ends of Zionism: Racism and the Palestinian Struggle"

Section 100
The Passionate State Of Mind, and Other Aphorisms (1955)
Context: The remarkable thing is that we really love our neighbor as ourselves: we do unto others as we do unto ourselves. We hate others when we hate ourselves. We are tolerant toward others when we tolerate ourselves. We forgive others when we forgive ourselves. We are prone to sacrifice others when we are ready to sacrifice ourselves.
It is not love of self but hatred of self which is at the root of the troubles that afflict our world.

Massad, in "Semites and anti-Semites, that is the question," Al-Ahram, 2004
On Anti-Semitism

Source: Hitler’s Beneficiaries: Plunder, Racial War, and the Nazi Welfare State (2007), p. 5

debunked in 2014
Misattributed

Is it Peace (1923)
Later life

Act I, sc. i.
The Critic (1779)

From "Ştiinţa antisemitismului" ("The Science of Anti-Semitism"), Apararea Nationala ("The National Defense") No. 16, Nov. 15, 1922, lst year.

Source: The German State on a National and Socialist Foundation (1923), p. 58