I can’t believe the Lutherans were poaching Mormons! /S
There were a lot of Mormons who’d left the church (in their opinion...the church continued to carry them on their rolls). They found homes in the various Christian churches in the area. Being strongly outnumbered, these Christian churches worked together on some issues to get things done, sharing schools was the biggest issue. Our ELCA church was allowed a member to sit on the LCMS schools board (my wife). We had our son in an LCMS high school. Nothing really surprising about that.
But this was: One of our son’s class members (there were 17 in all...) was the grandson of Ezra Taft Benson, then president of the LDS church.