I think Jah1914 has probably hit the nail on the head. There probably isn't one religion that is 100% correct. It is all down to interpretation.
The most major thing that put me of JWs was that they would preach untruths about other religions from the platform. Most listening, if they were either born ins or hadn't attended church before they joined the witnesses would be unaware of the inaccuracy of some of the statements.
In my opinion no Christian would include in part of their preaching slanderous statements about other religions - it is not Christ like behaviour at all. They should concentrate on getting what they are doing right, i.e. attending to the plank in their own eye.
Furthermore, surely just treating others how one would wish to be treated comes above everything else if one is living a Christian life. Being a Christian is liviing every second as one not just when mixing with one's own kind.
Everyone on this site can quote eloquently about what scriptures and verses we should be using etc. I only attended the KH for six years so am nowhere near as conversant but I can simply tell by someone's behaviour as to whether it is in harmony with what God would want for his people.
I KNOW that it is certainly not Christian to shun people so that they sometimes commit suicide, or that if people leave they may never see members of their families again or that spending more times knocking on doors or attending more meetings than others makes you a better Christian. Anyone can do those things to LOOK like a Christian but it is meaningless.
When I worked in Central London I was amazed at just how many volunteered from the various churches each night to give out soup and sandwiches to the homeless, they really got out there and helped the needy just a Jesus wanted us all to do.