If Christians introduced those ideas, how come 2000 years ago before Christianity was formed people were still not murdering and stealing?
Very few of my morals come from Christian ideals. I believe in judging a person based on merit, not on belief or what they do behind closed doors with consenting adults. I believe in asking forgivness to an actual human who I've wronged, not a invisible supernatural diety. I believe in doing good things for humankind, not because I expect a god to reward me or punish me, but because I want to make the world a better place.
I don't sell my daughters to their rapists, I would NEVER attempt to murder my child, even if a god asked me to.
I actually can't think of any morals I have that come from Christianity.