Marc Sageman in his book presents a conversation between two Egyptian Muslims. One of them, Ahmed Al-Sayed Osman Rabei, was Russian translation implicated in the Madrid bombings, and the other, Mahmud, was his roommate and a nonterrorist. This conversation shows their different perspectives on religion. When Rabei claims that Americans are enemies of God, Mahmud answers: “Listen to me, there is only one God. Frankly, I do not care if someone is Jewish, Orthodox, or Catholic; everyone is free to pray to the God he chooses, and it is neither up to me nor up to you to judge. (…) I only know one thing: praying to God. The important thing is for you to know God, to pray, and not to behave badly, and to not do things that are not right. All the rest is superficial (…)”. In this conversation we find the contrast between two types of Muslims: one type, which followed the Quran and another type, which went through brainwashing processes and became capable of being involved in terrorist attacks.