I'll have to assume (I know) that you consider Mormonism to be as valid as your religion.
False assumption. I just consider it boorish to go out of your way to attack other people's religions, except when excessive numbers of that religion's clerics actively and currently promote violence against members of other religions (eg, Islam).
I don't consider Buddhism or Hinduism to be valid, but I will not be so rude as to actively denigrate their believers.
"One man's theology is another man's belly laugh" -- Robert Heinlein