They (Mormons) are trying to take my 18 year old daughter away from us, how can I stop them?
If she is 18 and wants to join the Mormon Church, you probably can't stop her. Neither can you make them back off. If she were younger you could demand that they stop visiting her.
So, what can you do? First and foremost, you must pray for her and get others to do so. You did not mention your own religious conviction, so I am going to assume that you are a Christian (or you would not be worried about her joining the Mormon Church). Second, you must begin the process of educating yourself so you can affect her decisions. You have already done that by visiting my website and by contacting me.
I recommend that you send me a more detailed email so that I can respond more specifically.
I am praying for your daughter. P> Jim Spencer