I have never heard a Christian say that?
Whether I was an atheist or a Christian the laws against those crimes is a deterrent firstly, Jail or prison is what a normal person is afraid of, Isolation and a lack of freedom is a deterrent.
I would think they are not Christian if they say that and their heart isn't with Christ.
Your on the right track though.
Sorry, I don't believe you, because that is one of the single biggest arguments I have heard by Christians, that God is the only thing keeping people from being immoral serial killing baby rapists. In just the last week alone I can think of two peole on JREF, Jude Brando and Epix, who have made that claim. Whenever I click on any news story about Christianity or atheism, that is in many of the comments. For instance, when there was an article the other day by Penn Gillette about his proposed 10 commandments for atheists, in just the first page of comments, there were 3 making the argument that without God, they'd all be evil. I honestly can't keep track of how many preachers I've heard, or seen quoted here or elsewhere, saying that God keeps us from being evil.
I just don't believe you could have lived in the world and never once heard this argument when I hear it more than any other pro deist argument.
Though all the argument does is make me think man, we better NOT debunk Christianity, because apparently a lot of Christians are actually evil and the only reason they don't rape and kill us all is because of fear of getting hellfire for it.
In regards to the OP though - I had a very positive Christian upbringing. I went to a liberal Catholic Church. There was no gay hating or bashing the non religious or other religious, and we didn't really talk about Hell much at all. And when it did come up, it was presented to us that only really bad people went to hell, you didn't go there for not being Christians. They weren't Bible fundamentalists and we were taught evolution to be true.
They just focused on volunteer work, charity, being a good person, forgiveness, and acceptance/tolerance, as well as stressing good deeds towards the poor, weak, and sick.
Yeah, you could get that without religion, but honestly, I liked the superstitious stuff. I loved the saints and the rituals and the mysteries and the traditions. The songs and psalms and festivals and holidays. I honestly enjoyed my Christianity and all the trappings that came with it.
Of course, this isn't to say it excuses all the misdeads of the RCC as a whole.
But for me personally, I actually would still be Christian if I could. I loved my church and my priests and everything about it. I just don't believe it anymore, and I just can't trick my own brain into believing something that isn't true. But even if I did still believe in it, I probably wouldn't be able to be Catholic anymore due to the actions of the Church in regards to homosexuals and pedophilia in the last decade.