The same thing happened to me when I moved into my current house years ago. The neighbors were mormons. They were extremely nice people and we still keep in touch with them after they moved away.
When we first moved in, we were overwhelmed with home improvements, so they sent the missionaries to us because they need so much community service time we were informed. A couple of nice kids came over and really did help us out. The missionaries also preached a little, but they mostly just enjoyed being able to be normal kids who could listen to the radio at our house (they're not allowed to on their own) and eat a home cooked meal.
Just enjoy your neighbors if they are really nice people. We still visit with our former neighbors at their new home. We just have to grit our teeth at the constant background noise of Fox news! But, people are people and I feel badly for them because they are stuck in a cult just like we were. Look at ex-mormon websites and you'll see lots of similarities.