1.Are you really saying that your sister is denying that she is a Jew?<quoted text>
I ask you again, have you discussed this with her. I have. What is her opinion. Isn't her opinion the most important?
2. FACTS are far more important than a person's PERSONAL opinion. For example, you may hold the view that you are tall when the FACT is you are SHORT. The TRUTH is what counts and not YOUR personal opinion.
3. The ONLY opinion that matters is that of God and He calls her a JEW. He God made a covenant with her JEWISH forefathers and gave THEM the law. Do you understand that God gave the law to a people called JEWS? This means that their Jewish IDENTITY is NOT related to the law.