I know this wasn't meant to be a religious thread but you are kinda wrong. Syedna Isa (as) was a prophet for the Israelis aka jews. His teaching was limited and directed at the jews living at his time. You can't exactly say that the Islam is exactly the same as it was taught by Syedna Isa (as). For example, there is no worldly punishment for adultery in Christianity, another example turning the other cheek . And regarding your other points, Ahmadis believe exactly the same thing only we take prophecies metaphorically. I'm sure you don't know but Ahmadis follow the hanafi madhab supplemented by what Mirza Sahab said. (Note: I do not represent the official beliefs of jamaat e ahmadiyya, if you need full information you should go to alislam.org)