What people do is that they have a picture of Jesus in their minds, what he looks like, how he dresses, what he believes and does, and what he wants you to believe and do. Now if someone comes along claiming to be Christ and he does not fit the "picture" then they will not believe it is Christ. This is what happened to Jesus when he came before, in the minds of many he just didn't fit the picture and therefore was crucified. The trick of course is having the right picture. I might have the right picture, or I might not, but according to my picture I don't see anyone else who has the right picture, maybe some do, I just don't see them.
Again, what people do is they create their own religion, not the religion of the Bible, no, they don't like the religion of the Bible so they create their own religion, and that religion becomes their religion. These people think their religion is the one true religion, but it isn't.
The Bible says that unless God reveals the truth to you, you can't know the truth. This is really scary when you think about it. You, therefore, as I see it, one can not teach the truth to others, for it is God who reveals the truth, not you. And I have a saying: "If you tell lies in this word you get rich, if you tell the truth you get killed". Satan's world runs on lies, not the truth, therefore no truth is permitted. As the disciple said "The night cometh when no man can work", that time is now.