I would advise you to speak with your attorney about carrying in your church. Have a third party speak to your pastor about what insurance coverage the church has and what restrictions are on the policy.
Hold a meeting and get assurances from everyone there that they approve of you carrying during the services. Think twice before you risk your future for people who possibly won’t contribute a dime to your attorney fees.
Alabama has a carry law and I have my permit. Unless the building says you cannot carry in there, I carry in there. There is nothing in our building that says I cannot. I spoke last night with our head deacon. We were talking about the stuff in Canada and I again brought up the locking of our doors when services start and someone being on watch out in the main lobby. We have a TV screen out there where you can see and hear everything inside the main sanctuary. So easy to put someone out there. I told him heck I will do it every week if need be, but we need to lock the doors.