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Ms Fahima, 30, was released from jail on Wednesday after serving almost 30 months in jail for travelling to the West Bank, meeting an enemy agent and translating a simple army document.

“My first crime was that I refused to work with Shin Bet, the second was that I insisted on going to see the Palestinians and the third was that I protested against the Israeli policy of assassination,” Ms Fahima told the Guardian in her first interview since her release

For nine months of her incarceration she was kept in isolation, without access to any distractions such as books or television. “I used to lie on my bed and think about Jenin, the people I met and wonder how things were going there. I never get bored on my own,” she said.

Eventually, Ms Fahima was persuaded by her lawyer to agree to a plea bargain which would mean her serving only 10 months more than the 19 she had already served. It could take as long as a year to be found innocent, she was advised.

She is unbowed by her experience. “I learnt about the nature of Shin Bet, how they terrorise us, both the Israelis and Palestinians. I learnt about the nature of the government, how they do not want us to see what is going on in our name,” she said.

Ms Fahima had been an apathetic legal secretary who voted for the rightwing Likud party and carried Israeli prejudices about Palestinians until in 2003 she decided she wanted to understand why the Palestinians were attacking Israel.