While I understand your aggravation. The policy is posted.
I imagine the forum operators would have like to given you an explanation however this place is run by volunteers who simply don't have time for lots of explaining. They simply enforce the policy and move on, don't take it personally.
Also don't take it as anti Christian we both know religion and politics are the catalyst for volatile discussion, so they are banned.
Your signature may have gone unnoticed for years but once it was notice it was promptly deleted per the posted rules.
If you know longer care to be a member, I get it. But don't cut off your nose to spite your face. The only one you are penalizing/affecting by quitting is yourself.