The more time I spend on this forum, the more convinced I am that encountering followers of Jesus who actually follow his teachings and demonstrate that being a Christian is more than just a label to wear is a rare occurrence. Many Christians seem to have forgotten Jesus' teachings about loving your neighbor as yourself, loving your enemies, and treating others the way you want to be treated. In fact, most Christians that I've met don't behave any differently from the non-Christians that they piously point a judgmental finger at.
What Christ taught and His example are reasons to be Christian, but you're right that today there is little difference between how Christians act and atheists, for example, and atheists point to that and say "religion is not a good thing, and just divides people", which brings to my mind something that Abdu'l-Baha said:
His third teaching is that religion is a mighty stronghold, but that it must engender love, not malevolence and hate. Should it lead to malice, spite, and hate, it is of no value at all. For religion is a remedy, and if the remedy bring on disease, then put it aside.
(Abdu'l-Baha, Selections from the Writings of Abdu'l-Baha, p. 248)
This are similar statements he said. Anyway, this is a factor of why in "western" nations, they are getting progresively less religious, this religious strife. Materialism is also a factor in this.