RE: If you believe Jesus was the Messiah, you are a Christian - full stop. If a person who believes that calls themselves a Jew, that is deceit.
I am not sure I follow the logic. Let’s ask a different question — is a person who is a Jew but does not believe in the God of Abraham, Isaac and Jacob still a Jew?
Put in another way, if you were born a Jew but disbelieve in Judaism, are you still a Jew?
> Put in another way, if you were born a Jew but disbelieve in Judaism, are you still a Jew?
I say the answer is a definite “no!”
A word cannot mean two things at the same time. It either means someone who believes or it means something else. As there is no other word for someone who believes in Judaism, and there are other perfectly fine words for genetic/ethnic relationships, I refuse to let the word mean two things at once any longer. This kind of slipperiness of language should be abhorred by anyone who intends to be understood.