If you want to come down on metal musicians for disrespecting Christian history, let's start at the start.
"Black Sabbath" is a very offensive name. Henceforth, we shall refer to them as "A Very Dark Colored Version of one the Days of The Weekend".
Also, "The Number of the Beast"? I mean, did there have to be "666" in there? There are a lot interesting numbers. The chorus would be as memorable and catchy if they had gone for a number that wasn't offensive to Christianity. Like 3.5 or 12.
Really clutching my pearls at "Highway to Hell" too. Hell is very offensive. There are a lot of places that are very hot and humid they could have gone with instead. Like Borneo, or somewhere in the tropics.
Also, the band "Armored Saint"? If you are going to appropriate and sully the term 'saint', you better at least have one of the better Anthrax vocalists as a member. That's really excessive in terms of offense. When I think of the term "Saint", I don't think of "The third best vocalist in Anthrax".