If they truly mean what they say then the jails and prisons will need to emptied of thieves, muggers, rapist and murders to accommodate the crowd as I suspect a good number of the congregations will accompany the pastors in resistance (MAYBE).
Then again I have heard conspiracy theorist claim there are already built interment camps for just such a purpose, I do not reject the claim but if in this instance the SCOTUS goes against the constitution we will see, such facilities will be necessary if Evangelical leaders mean what they say.
Internment camps.
Interment is the burial of a corpse.
;)