I actually give some people a pass on this. If I was a serious believer in a religion other than Christianity, I would be painfully aware that AD does not mean “After the birth of Christ” but “Year of OUR Lord”. It’s only when you get nominal agnostics who don’t give two figs about religion using it to be disagreeable that I get nerked off.
Well put. I would not want to make a false declaration of faith. To me, using the designator AD is like taking communion as a non-Catholic.