“And, as you state, the city should be sued. Not only does it confront the right of freedom of Religion, it confronts the right to peaceably assemble.”
If we don’t start making life tough on these cretins, nothing will stop them.
We have any number of service organizations in my town (14,000), Kiwanis (2 chapters), Lions, Moose, Rotary, Knights, Chamber, you name it. And members are generally also associated with a church, and some, as in my Kiwanis club, are also associated with the city council, park district, whatever.
Should something like this happen in my town (which, granted, is fairly conservative), I could see an organizing of clubs to confront the issue. Word gets around quickly. And there are any number of ways to put the heat on.