[1] As a prominent representative of the "social realism " trend in Israeli art, Knispel turned to painting the living conditions of Holocaust survivors.

He fled his home and arrived at the Israeli Embassy in Rio de Janeiro in the trunk of a car.

[3] Knispel returned to Israel and lived in Haifa, where he served as an artistic consultant to the municipality in the years 1964–1989.

[1][4] In 1995, after the fall of the military dictatorship, Knispel returned to Brazil and divided his life between Haifa and São Paulo.

[2] In 2018 his large-scale work "Signing the Peace Petition in Acre" (1953) entered the Tel Aviv Museum of Art collection.