Agreed. Presuming that one means something reasonably close to what a hearer might infer from the use of the name – otherwise it’s pure Humptydumptyism. (“A word means whatever I choose to mean by it.”) Someone who does not adhere to the Nicene Creed, but accepts Jesus and his teachings as a role model for living ethically would be a Christian in my book. Someone who does Workings for the Lord and Lady and believes that the Hebrew God was purely mythical and Jesus a figure of legend without historical referent would not, IMO, be entitled to call himself a Christian.
Welll, presuming we Christians are right, Jesus gets to do that defining. And if we’re wrong, it hardly matters who does it, does it?
However, I’d be inclined to look to His recorded teachings, to the extent we can count them as accurate reflections of what He intended His followers to do, to make those specifications.
You know, things like “Thou shalt love the Lord thy God with all that is in thee,” “Thou shalt love thy neighbor as thyself,” “Do unto others as thou woulds have them do unto thee,” “Judge not, lest ye be judged,” “Inasmuch as you have done it unto one of hte least of these, you have done it unto me.” These comprise a coherent behavior set that can be shown to be His expectations to the extent that anything can.
On the other hand, “Thou shalt smite the abortionist,” “Thou shalt despise thy gay brother or sister, and call him or her abomination,” “Thou shalt cast thy vote for the man with the elephant,” “Thou shalt not suffer a woman to stand as equal to a man” – these are nowhere found in Scripture, save in the conclusions of some from debatable or context-free passages.
Oh, and Friar Ted? – Be sure to leave no jot or tittle of the Law or the later commandments unfulfilled. I’m sure some of our learned Jewish members will be glad to give you guidance. This includes, “Be thou perfect, even as my Father in Heaven is perfect.” You see, you just sat in judgment over those you believe to be “picking and choosing” from Scripture. By Matthew 7:2, you can expect to be judged on whether you yourself are picking and choosing, a fate you could have avoided by not making that judgment. Have fun with kashruth!