It is between them and God. God will make his decision. It it is not up to me or you to decide.
Then there's no need for discernment, is there?
Judgment of false doctrine MUST happen.
Mormonism teaches a false version of Christianity. If you read the thread, you will see all the places where their error lies.
And anyone who believes in a Jesus who is a created being, not virgin born as Scripture required, who is the half-brother of Satan, is believing in a false Jesus, who CANNOT save him.
The judgment of whether they are Christians or not is NOT based on whether we like them or think their works are not good enough, but on the fact that they believe in the false Jesus their religion teaches them, a false Jesus who cannot save them.