Christianity is a rather young religion. Many religions have existed before it, and civilization chugged along. In the meantime, many of the major advancements in human progress have recieved significant protests from churches. Christianity has been readily used as a tool of oppression time and time again throughout its 2000 year run. If you can convince people that what you are doing is holy and that only those against God would be opposed then you can get away with anything.
tl;dr - you're a fucking moron if you think that removing Christianity will lead to an anomie.