No, and for many reasons.
For one, it is enough to simply confess your sin and do the required penance. You don't have to "repent for the rest of your life." There's no point in that. Once the sin is forgiven, it's forgiven.
Secondly. just because a person confesses a sin and does his penance, that does not mean that he will go to heaven. The mere fact that he's Catholic is certainly not enough. You have to die in good standing with the Lord in order to receive heaven for your eternal reward. It is possible, in your scenario, that the Catholic who committed murder, confessed it, and did his penance could later sin in such a way that his relationship with the Lord is no longer a righteous one. If he dies in that state, he will go to hell, even though he is a Catholic.
Finally, there is no reason to believe that the Jew is going to hell. His Judaism is certainly not reason enough.
Justine decides to be Jewish.
No, she was not Jewish, she was Roman Catholic.
No, Drake is not catholic. He is actually Jewish.
no he was Jewish
No. Mitzi Gaynor is Catholic. In a May 10, 2010 interview with Richard Skipper posted on his blog "Richard's Rants" she says that she and Jack Bean, her husband and manager of 52 years, "were both from the Midwest and Catholic." In the Village Voice review of her 2010 New York show it states that when she comes on stage in her sailor outfit she "confesses to being a Catholic Hungarian Virgo."
If all goes well, after nine months a health baby will be born. Hopefully, the Jewish man will allow the baby to be raised in the Catholic faith. According to Jewish law, the child in such a case is Catholic, not Jewish or "half-Jewish."
No,Mark Harmon is not Jewish-he happens to be a Roman Catholic.
No, he's not Jewish and was raised a Roman Catholic.
His father is Jewish. His mother is Catholic.
no, she's not catholic, she's jewish.
She was a Catholic.
No Natalie Portman is not Catholic, she is Jewish.