Despite the love and respect Brutus had for Caesar, he decided to take part in the conspiration against him and assassinated the emperor himself. In Brutus's words in his speech in the Capitol, we can read "not that I loved Caesar less, but that I loved Rome more" as an explanation for his bloody deed. Since Caesar's ambition was dangerous for the Romans, Brutus slew him.
In some places u are not given the opportunity to go out and do wat ever u want. Unlike the Christians in some countries, the Muslims over there do not want to see them holding a bible or even saying that they are Christians. If u ate caught, u will either pay a fine or u will be killed.