In the play, Julius Caesar, Brutus is conflicted by two things: his love for his friend, and his love for his country. He has known Julius his entire life; they'd served together in war, grown up together, participated in numerous occassions together. But, now, with Julius' growing stardom in the eyes of the people, Brutus fears that Julius will be come a tyrant. Julius doesn't do himself any favors when he starts acting like one. So, the dilema comes down to a choice between his friend or his country. His biggest problem is that he does not verify facts, speak to Julius directly about his concerns, and sadly he is fairly naive when it comes to human nature. He trusts that Antony's speech won't stir up a riot (he's very wrong), he also misjudges how the people will take Caesar's death.