10 (comandments) and 8 (beatitudes) - it's all there and tells you right from wrong.
these are the rules you as a person can choose or choose not to live by. you can't impose them on anyone else. hence they should not be legislated or considered in public discourse.
selfish, libertine behaviour pattern and do only what feels good, is profitable, convenient or fun and to hell with the rest.
it's quite interesting that the only two options in your mind is either be Christian or be an essentially immoral person.
it may surprise you that there are plenty of non-Christians who honor their parents or other people who took care of them, do not kill, do not steal, do not deceive, not because they belive in some mythological figure that will send them to hell for disobedience, but because they know, too, that these things are wrong