Freedom of speech and Charlie Hebdo

There is a fundamental difference between Islam and Christianity. Protestants never mind any caricature or jokes about Jesus, although Roman Catholics do not like that. Pictures and sculptures of Jesus are abundant in the western world and it has become a part of their culture. We Muslims revere our Prophet (pbuh) in a way which is not seen among any other religious groups. So it hurts our feelings whenever we find someone talking baselessly against our Prophet (pbuh). It is only natural for us human beings to protest if our feelings get hurt. And there are some people who respond violently if their religious feelings are hurt.
So in the name of free speech and expression why do advocates of this group only make jokes about our Prophet (pbuh), but are, at the same time, afraid to treat other religious icons similarly? We must stand firm against hypocrisy of the western media.