I must make it clear that it is not just Mormons who use this kind of reasoning (if you can even call it that) to claim that something is true. It's nothing more than an appeal to emotion, which anyone with at least half a brain can plainly see is fallacious. What I, or anyone else thinks or feels has absolutely no bearing on what is true or false. For example, if Dennis Markuze believed very strongly that anyone who writes an Atheist blog is inspired by the devil and will burn in hell, doesn't make it so. If hell and the devil don't actually exist, Atheist bloggers can not be inspired by the devil and will not burn in hell no matter how strongly Dennis believes.
Similarly, if Ken Ham has a very strong emotional response when he reads Genesis, it doesn't have any bearing on whether Genesis is true or not. This applies to every single belief on earth. No matter what ANYONE believes, emotion and belief do not qualify as criteria for the veracity of anything.