My father was crying. It was the first time I saw him cry. I had never thought it possible. As for my mother, she was walking, her face a mask, without a word, deep in thought. I looked at my little sister, Tzipora, her blond hair neatly combed, her red coat over her arm: a little girl of seven. On her back a bag too heavy for her. She was clenching her teeth; she already knew it was useless to complain. Here and there, the police were lashing out with their clubs: "Faster!" I had no strength left. The journey had just begun and I already felt so weak… "Faster! Faster! Move, you lazy good-for-nothings!" the Hungarian police were screaming.
That was when I began to hate them, and my hatred remains our only link today. They were our first oppressors. They were the first faces of hell and death.
They ordered us to run. We began to run. Who would have thought that we were so strong? From behind their windows, from behind their shutters, our fellow citizens watched as we passed.

Can you tell me what is the purpos of this passage?