No, not really. Remember that the entire Christian Church started out as Jews who just believed that the Messiah had arrived in the person of Jesus Christ. In the Torah there are, I believe 613 commandments. St. Thomas Aquinas divides this into three categories: the moral (think of the Ten Commandments), the legislative, and those commandments which were to foreshadow the Messiah. The moral commandments are valid for all time, in this we did not copy Jewish ways, we just remained faithful to the moral commandments of God. The legislative commandments may or may not be valid depending our your civil government. Those commandments which were to foreshadow the Messiah are a serious sin to follow as to follow them is saying that you are still waiting for the Messiah and do not believe that He arrived in the person of Jesus. This is why the Council of Jerusalem ruled that (and St. Paul reiterated) to receive circumcision is to condemn yourself (if you receive circumcision believing that it will save you). Circumcision has been replaced by baptism.
No, in fact Catholicism and Judaism ideologically have very little in common. However, some principles and customs of Catholicism have their origins in Judaism.
Jewish/Jew Catholicism is the religion not the term for people who follow it. Catholics follow Catholicism. Like Christians follow Christianity. Jews follow Judaism.
Jennie Garth converted from the religious movement of Seventh-day Adventism to a more general Christian faith. She has talked about her shift in beliefs, citing a desire for a more inclusive and broader spiritual practice.
John von Neumann was born Jewish but converted to Catholicism
According to Jewish law, yes, because his mother was Jewish.(His father was a convert to Islam from Catholicism.)
No. She was Protestant but converted to Catholicism .
No, Anne Frank did not convert to Catholicism. She was Jewish and continued to identify as Jewish throughout her life.
Purim is a Jewish holiday, it's not a part of Catholicism.
The important thing is that Catholicism knows one God only.
Go to Borders and buy a copy of Jewish Cooking.
The Catholic Encyclopedia states that in fact he did return to Catholicism and repent the err of his ways. As to his ancestry no note is given.
The Jewish faith was started by God. Jesus was born into the Jewish faith and started Christianity (today's Catholicism). From Catholicism came Luther's new religion which has regenerated hundreds of times to form today's Protestants, Episcopals, Baptists, etc.
You can buy a copy of a megillah in most Jewish book stores or you can purchase one on the internet.