The religion of Christianity didn't exist when Jesus was alive because its based off the story of his life and teachings. Hence the "Christ" part of it.
Jesus being Jewish is also extremely common knowledge.
There's literally not one great song on 1989. Blank Space & Style kinda get boring after the first chorus. At least ARTPOP has DWUW & Prism has Dark Horse. Gosh, I wish I had blonde hair & blue eyes so I could be mediocre and still be so powerful.