My response? Please stop your attack upon my own Christian worldview, especially if you deem that religious worldviews of others are not to be challenged. IF they are not to be challenged, per your own worldview, then what in the world are you doing challenging mine?
(Some consistency on your part would be nice here)
I am not LDS, but I know many who are Mormons who I would be glad to have as neighbors.
Ya know, I not only have Mormons as neighbors, but Mormons as family members.
And...ya do know...doncha...that a true Christian's goal isn't to have Mormons as earthly neighbors ONLY, but eternal neighbors. The Mormons haven't given up Christians as a "mission field"; therefore, the key question here is: Why have you (at first glance) given them up as one?
If you were living among the Pharisees in Jesus' day, the goal would be to have them as ETERNAL neighbors...not tell Jesus to silence his critiques of them (see Matthew 23; John 8, for example).
You are NOT seeing them as children of God, but as something way less than God sees.
So when Jesus called the legalists of His time--the Pharisees--as children of the devil (John 8), was he guilty by your verdict, too, of "seeing them...less than God" saw them?
Take a deep breath.
Now, look at the totality of what Christ preached on this earth, rather than seeking to use partial pull quotes to support your perspective.
You have family issues, as you said. They can be among the most painful and discouraging things we may encounter. They can gnaw at us, give us no quarter. At the end of the day, we must balance the intellectual (wisdom), compassionate (charity} and the spiritual (faith).
God bless you on your spiritual journey, may you find and accept His truth in all things.
Sursum Corda