The law did not address churches specifically. The law said that you can prohibit CCW by putting up a sign. That included churches. The churches who sued want the state to dictate what is allowed on their property. THEY WANT THE LAW TO SPECIFICALLY BAN CCW ON CHURCH PROPERTY without them having to put up a sign. They are claiming that the sign requirement is unduly burdensome and messes with their "message of peace."
They want the law to be "opt out" like Ohio's (CCW prohibited in churches unless specifically authorized by the church) rather than "opt in" (put up a sign if you want to prohibit CCW).
Not exactly. They don't want the state to ban CCW in churches, yet. However, these specific churches wanted to be exempted from having to follow the existing law. Specifically, they wanted to be expempt from having to post signs IF they banned CCW in their churches. They also wanted to be able to ban guns in their parking lots, which the state says that they cannot do, as the law is written. They found a judge who said that the state is not within its powers to enforce those last two aspects of the law on churches. However, any other church can still allow CCW if they so desire, or they can post signs if they want to ban CCW inside the church and don't have a problem with signs.
What isn't quite clear to me is if a church has not posted signs, can they then immediately prosecute a person, who has come into the church carrying a concealed weapon, for trespassing. I don't believe they can. They can ask him or her to leave, and if he or she doesn't, then they can likely charge him or her with trespassing.
The likely scenario would be a non church member attending a wedding at a particular church which bans guns but does not post a sign. How is the non member supposed to know he is trespassing? He wouldn't. However, if an official of the church happened to spot his gun and then told him he cannot have a gun in the church, he would have to leave. Since the court says that churches can also ban firearms from their parking lots, this person would have to drive off of their lot, park somewhere else, leave his gun in the car, and walk to the church. I don't believe, if he did so, he could be charged with trespassing for the initial infraction of not obeying their policies, since they did not POST their policies against guns.
Of course, I could be wrong about this, but I think I'm at least pretty close.