I'd be willing to bet it's all about this;
Does it look like an Emergency Vehicle could get through there speedily?
Go read the link angrycookieman posted above.
They had parking covered, but this wasn't just a "home bible study" group.
As a Christian at first I was upset about this and was going to jump in here getting all over the "naysayers".
But after a little more research and the other links above, I can't see this as religious persecution.
Just someone trying to skirt the law.
This seem to be about fire code and building code violations, and the "pastors" refusal to obey some basic rules.