It is not good enough to know why we are oppressed and by whom. We must join the struggle for what is right and just. Jesus does not promise that it will be an easy way to live life and His own life certainly points in a hard direction; but it does promise that we will be "satisfied" (not stuffed; but satisfied). He promises that by giving life we will find life - full, meaningful life as God meant it.
Jesus' life and words are a challenge at the same time that they are Good News. They are a challenge to those of us who are poor and oppressed. By His life He is calling us to give ourselves to others, to sacrifice for those who suffer, to share our lives with our brothers and sisters who are also oppressed. He is calling us to "hunger and thirst after justice" in the same way that we hunger and thirst after food and water: that is, by putting our yearning into practice.
I have met many, many farm workers and friends who love justice and who are willing to sacrifice for what is right. They have a quality about them that reminds me of the beatitudes. They are living examples that Jesus' promise is true: they have ben hungry and thirsty for righteousness and they have been satisfied. They are determined, patient people who believe in life and who give strength to others. They have given me more love and hope and strength than they will ever know.