I think that means that people already have the right to carry concealed weapons at church. I didn't know that they needed a special law to allow churches to ban them.
"Blessed are the peacemakers, for they will be called the sons of God." (emphasis mine)– Matthew 5:9.
I'm pretty certain that Christ did not attack or defend himself against those who would hurt, attack or kill him. If he is the living example of right and wrong ... well then I think his actions speak volumes.
(UPDATE: I don't know why I didn't mention this before, but it should be noted that I am – and always have been – an avid gun owner and shooter. I can relate to the "from my cold dead hands" ideology when it comes to protecting my rights to own firearms. I don't want anyone taking my guns from me. Period. I don't feel the need to haul them to church either.)