In From Catastrophe to Power, she examined Zionist immigration policy after the end of World War II for survivors of Nazi extermination camps, and in particular the divergence of interests between the Jewish community in Palestine and the survivors.
According to her, while Zionist organizations acted in the interests of the victims of the Final Solution, there was also a political instrumentalization of this suffering in order to fight the immigration quotas imposed by Great Britain.
In particular, she accuses the Jewish state of instantiating the Holocaust to justify "the abuses of the Palestinians".
She also wrote a book critical of the occupation of the Palestinian territories, Lords of the Land, together with Akiva Eldar.
A critic of politics in Israel, Zertal has spoken out in favor of the refusenik movement that refuses to serve in the Occupied Palestinian Territories,[4] in favor of a boycott of Israeli companies active in the West Bank,[5] and against the recognition of anti-Semitism in anti-Zionism.