It might 'prove' nothing; but it SHOWS that your INPUTS to this thread are not very deep, theologically speaking.
But when you state this...
They cannot prove themselves to be right before they cast others as wrong....you've pretty much summed up the MORMON style of proselyzing.
You really have a thing for Mormans, like the Nazis or the Muzzies have a thing for the Jews. Check under your bed at night - - and in the closet. They’re everywhere!
Not very deep theologically speaking? Proof does not mix with theology. I don’t speak deeply of Mickey Mouse or Donald Duck either.
I believe in good and evil - but just can’t put these religious contests like yours into the former category; they belong in the latter. Look at your company of religious zealots throughout history who claim they have been the right religion—and taken up a personal duty to chastise the non-believers. You’re not in good company.