How did Daniel formerly look at stealing food, and why has his attitude changed?

While serving as a member of Rosh's gang, Daniel was regularly called upon to participate in acts of robbery against unsuspecting travelers. Even though many of these travelers were Jews like themselves, Rosh is such a fanatical zealot that he thinks that the end justifies the means. The revolutionaries need a regular supply of food and valuables to survive and continue their fight with the Romans.
Daniel wants to impress the charismatic zealot leader, so initially goes along with the robberies enthusiastically. However, he quickly develops pangs of guilt after one of the old men the gang rob reminds him of his beloved grandfather. Gradually, Daniel becomes disillusioned with Rosh's methods. He joined up with the zealots to fight Romans, not steal from his own people. This is the beginning of what will eventually become an irreparable breach between Daniel and Rosh.