Cardinal Wuerl of Washington D.C. speaking at the end of the Mass of the Holy Spirit to open the Academic year at the Catholic University asks that question. Where are the voices raised in horror over what is happening to the Christians and other minorities in Iraq?
Watch this video and ask yourself the same question. This is a man that is deeply troubled by the silence.
https://www.youtube.com/watch?v=kujTZbwOMcc