No, I personally do NOT agree that they have higher morals.What they DO have is a large list of "loopholes" and ways they can be excused, or "forgiven", for what they shouldn't have done in the first place.Instead of working on being a better person and taking responsibility for their actions, they just pull out the "get out of jail" free card, and say that Christ died for their sins and thats the end of it.Those who aren't Christians also find a way to justify their crimes......just look at the Taliban.Now, I'm not saying that some religious people don't try to be better people but let's face the facts that the most heinous of all crimes have had some sort of religious connection , inlcuding the fact that the offenders have had a belief in God.As one example...Whether people want to admit it or not Hitler did believe in God and many ideas were based on his interpretation on Bible passages.People think he was an atheist because the various other avenues he pursued, such as the occult, but in reality he just wasn't going to be limited by anything that could potentially help his "cause", even if those things seemed to contradict Christianity.
“The folkish-minded man, in particular, has the sacred duty, each in his own denomination, of making people stop just talking superficially of God's will, and actually fulfill God's will, and not let God's word be desecrated. For God's will gave men their form, their essence and their abilities. Anyone who destroys His work is declaring war on the Lord's creation, the divine will.”
( Adolf Hitler, Mein Kampf, Ralph Mannheim, ed., New York: Mariner Books, 1999, p. 562.
The belt buckle of the Hitler's army uniforms read: Gott Mit Uns ( "God With Us")
So while it might seem like a good idea for people to live by a code that is religiously based, I personally find as a secular humanist, that doing good to others, simply because it is the right thing to do, without thought of reward or fear of eternal punishment, is the best way to live.