"Okay if someone interprets it as having occurred, am I to believe it?"
Given that the Koranic text does not specify the moon being reformed, then it would seem likely that the interpretation that this is describing a future event is the most likely. As I said before, if you really want the answer to this question it would be best to examine Muslim scholarship based on reading the Koran in Arabic. I am not qualified to answer this question.
"Why should that resurrection be more believable than a talking animal?"
I was making the point that the truth of Christianity rests on the truth of the Resurrection. The story of Balaam's ass is not such a game changer - if this were disproved but the resurrection were proved, Christianity would still be valid, but not vice versa.
"The problem with those references like I said is that one could easily find other Christian sects that do not agree some of those statements."
I still think it's better to look for agreement rather than disagreement as a general principle e.g. fewer armed conflicts. Both the Apostles' and Nicene creed are used by a wide range of mainstream churches and if you examine
http://www.vatican.va/archive/ENG0015/_INDEX.HTM and compare that with the views of reformed Christians in the Westminster Confession you will find that the degree of agreement far exceeds the disagreement. What does the beliefs of "other Christian sects" (whatever that means) prove except that people adopt different views.
"People have different beliefs for various reasons e.g different exposures, different attitudes to learning, different ages etc." This looks like the nature/nurture debate. So are you saying that two identical twins brought up in the same environment are bound to have the exact same set of beliefs? In the end you make a decision e.g. when you vote in an election after studying the manifestos.Why are you so reluctant to own up to this.