Of course, a no guns sign at a church has the same effect as any other "gun free zone." It gives criminals and terrorists the peace of mind of knowing that they will probably be the only ones who are armed.
“Under Texas law, churches can ban concealed or open carry simply by putting up a “no guns allowed” sign. If you are caught carrying a gun in a church with a no guns sign you can be arrested and have your concealed carry permit revoked.”
You are incorrect. The required signage is the 30.06 notice and must be posted at prescribed locations (by each and every entrance. A simple “no guns” sign does not have the force of law. Further, the penalties you cite would only apply if you are asked to leave and refuse.
So your attempt to scare off those who would protect themselves and others is invalid