Of course they will. The Mormon "church" isn't Christian, and the United Methodist Church has for the most part become so liberal and unbiblical that it can no longer be considered an authentic, bible-believing Christian denomination. My Godly Methodist grandparents who passed on to Heaven in the '50s would leave the current UMC in a heartbeat if they were still living here on this sin-cursed ball of dirt.
I have family members who left the Luthern church as the one they were attending began supporting that which it should not...
I have no doubt true believers will be eventually going underground because they will not be tolerated in the direction our nation and it’s governance is going....and the churches are fast being invaded with undesirables who seek to “change” the church to something it is not and was never met to be.