The Offering of Christianity to Current Culture

As I sat in Seminary class the other night, I suddenly had a question that popped or pooped itself into my mind. If Islam is the fastest growing religion in the world, and having some sort of religious affiliation including atheism is becoming so popular, then what do these other religions and philosophies offer people that Christianity does not? I mean...to be quite honest, one of my largest and over-arching reasons for believing in Christ, notably not necessarily Americanized Christianity, is that the message of the gospel is so transcedentally different than any other gospel ever presented. Whether its Islam, Buddhism, or being your own personal God, not one of those systems is based on the idea that we must die to self in order to love God and our neighbor. Sure, these relgions have great morals, and to be quite honest, probably act more Christian than Christians, but they are rooted in systems of self-interest. I think perhaps that the reason that these other religions are so popular is because they do not force us to really come to terms with the ugly beast of humanity's terrible capacity to sin. Yes, these other religions call for morality, but merely calling for morality is not the fundamental problem. Humanity is flawed and broken. What we must do is not merely force these peoples of other religions to hear us, we must show them a Christ in us that means what he says. We have to take Scripture truth and more than talk about it, more than preach, more than be convicted by it, we must live by it. And if we don't, then we face the problem that the churches in Revelation face, we have cooled off in a world that desperately needs a hot radical purpose. That's what we as society want, but we damn people to hell if we do not provide them will the real answer.Then he said to them all: "If anyone would come after me, he must deny himself and take up his cross daily and follow me.Luke 9:22-24