I just remembered a line from the movie Red Planet. Ok fine, not the greatest of films, but it had some interesting characters. One of them was an old(er) scientist who (I presume) lived his life in the pursuit of science. Then one day, he turned to religion. When Val Kilmer asks him why, he says "Because science couldn't answer any of the really important questions."
You say you would like to live in a world without faith, but have you considered what that entails? Faith includes all that which cannot scientifically be proven. Science deals of in facts, not opinions of morals.
In this world, there would be nothing wrong with killing a person. For no reason at all, just like that. There is no scientific reason why you shouldn't. Same goes for inflicting pain and misery. Same goes for cruelty, for exploitation. Its a matter of morality, since morality is subjective, who is to say yours is better than mine?
Science can never answer any of the existential questions. Not because we don't have the refinement or the technology, but because it is by definition beyond the scope of science. In a world without faith, you would have no purpose at all for being. You just are. There's no reason to do or not do anything, because you ave no meaning. Your're not even a machine. A machine has a purpose. But science can never tell us what your purpose is, it can never tell us if we have one at all.
Think about this. You have no purpose, you just are. Nothing more, nothing less. There's no reaosn, no meaning. Not even survival of the species, not anything. You just are. I doubt any human will ever be able to live in such a world, to face such a reality. You may think you can, but you're wrong. Its like saying that you could survive being hit by freight train. You've never tried, nor has anyone else (and lived to tell about it). You may think you know the consequences, but the consequence is a total loss of...everything.
Its pretty short sighted to say that faith is responsible only for murder, intolerance and so forth. These can and are being worked out of the human system of faith. Faith is being refined to get rid of all the bad. Give it some time, and faith will no longer be associated with any of those things.
Science is the house which you build. The tools are logic, reason, observation, experimentation. With science you can build yourself a pretty nice house. Faith is the Universe in which that house resides. No Universe, no house.