First of all, lets head off some potential problems before they start. I am not doing this thread to argue. If you would like to, thats fine. Also, I totally understand and allow that someones individual beliefs as a Christian might be very different from the organized religion I am referring to here.
Ok, here goes.
In thinking about the claims Christians in general make, overall, they feel they worship the one true god, Jesus. You will frequently hear statements that Jesus saves us from our sins, that Jesus will protect his people, destroy the wicked. (if you don't think he will destroy the wicked, thats fine, I talk to people everyday who says he will do that to non Christians. So lets acknowledge that these kinds of Christians are out there)
Then there is the matter of those who learn evolution and see that science and the bible are at odds when a literal reading is done. Of course, if it requires more then a literal reading, my next question is, who gets to interpret these supposedly non literal passages. You? Me?
Then there is the problem of the accident of your birth. Christianity as a percentage is somewhere in the 12-15% range depending on the numbers you choose to use. Hardly an overwhelming number for the one true religion.
I personally continue to see that there isn't a lot of acknowledgment on the above issues. While on the one hand, they feel their way worship is best, their god superior. Yet other religions claim the exact same thing with their holy book, their deities, and their dogma and explanations. All sides who make such claims have the exact same evidence.
While doubt is mentioned by some as a key ingredient to a healthy faith, in the bible, it is also condemned. Even if you personally don't condemn it, most Christians do. And what about doubters who are scientists, rationalists, humanists, who are only being intellectually honest with the questions and objections they raise?
If asked, I don't mind saying that I am Christian, much in the same way Catholics say they are Catholic. (i.e. they were raised that way, that is their identity) I come from a Judeo-Christian background in a Judeo-Christian world. So that is indelibly part of me. However, I don't worship the Christian god, I am a cultural Christian. (btw, if that offends, I won't make a big deal out of it if you don't want to call me a Christian, that isn't my point...)
What I see as a problem is the sheer number/math issue. God is god. You can't all be right. Yet, Christians are a minority. Even if that isn't the point, the fact that the majority of the world believe differently due to background, culture, etc, seems to put their lives at danger.
What will Jesus do with the continent of Asia? Burn it? They can't possibly be saved. Muslims? Sure is a shame that over a billion people are born into a hatred of Christianity. These poor people never have a chance. Is that their fault?
So why believe that you have the best religion, the best god, that your beliefs are superior, when for most people on planet earth, they are not? And what does that say about your god that most people truly don't have even a remote chance of ever converting, ever learning about Jesus, due to the accident of their birth?
The smaller the world gets, the less important religion becomes.