I believe you mean the ceremony when Jewish boys are considered old enough to take on the responsibilities of a Jewish adult and fully participate in religious services. This is called a 'bar mitzvah'.
The Jewish ceremony when young boys join the synagogue is called a Bar Mitzvah (for boys) or a Bat Mitzvah (for girls). It is a significant milestone in Jewish tradition where the individual takes on new responsibilities and is considered an adult within the community.
It is a Jewish ceremony to celebrate a young boy becoming an adult
Bar Mitzvah at age 13
The person becomes a man. According to Jewish law he has responsibilities in the community that he didn't have before. He can help to make up a quorum of congregants in prayer, he needs to fast on the fast days, he can read from the Torah in the synagogue.
The "Bar Mitzvah" is the Jewish young man at the time of his 13th birthday, not a ceremony. This occasion in the young man's life may or may not be marked by his first participation in the standard synagogue service. If it is so marked, then the historic and cultural reason for acknowledging it is that it's a time of joy for his parents and the Jewish community. As such, both the boy and his father may well be honored with standard functions in the course of the standard service. If they're not familiar with the standard synagogue service on account of their prior disinterest and rare attendance, then all manner of impromptu, glitzy ceremonial maneuvers may be improvised. The only standard, traditional, unique moment prescribed for the father of the Bar Mitzvah during the standard synagogue service is a blessing comprised of eight Hebrew words, often compressed into four if the eight are an unfamiliar burden, in which the father expresses his gratitude and relief that he is no longer responsible for the cultural and religious misbehavior of the Bar Mitzvah.
The same reasons young and middle aged people go to a synagogue.
They have Bar Mitzvah ceremonies for boys & Bat Mitzvah ceremonies for girls.
he raped them and called them jewish.
In our synagogue, we have an informal coffee-house on Saturday night, during which young people come to learn about Judaism.
A Bar mitzvah is when a Jewish boy turns 13 and becomes an adult. As part of the customary rite of passage he will read from the Torah in the synagogue. The Bar Mitzvah ceremony asserts and celebrates this ascent to manhood. A Bat mitzvah when a Jewish girl turns 12 and becomes an adult. In Orthodox Judaism, all adult Jews are expected to keep all 613 commandments.
The phrase is 'bat mitzvah'. Bat mitzvah, which means 'daughter of mitzvah' is what a Jewish girl is called on her 12th birthday. This means that she is considered ready to take on the religious responsibilities of a Jewish adult. This is often accompanied by a religious ceremony that is referred to as the bat mitzvah ceremony.
Jewish Coming-of-Age Ceremonies for their children are called Bar or Bat Mitzvahs(depending upon the sex of the child receiving the ceremony). For the boy, he receives his Bar Mitzvah at age 13 years. For the girl, she receives her Bat Mitzvah usually at 12 years(occasionally 13 too). Bar & Bat Mitzvah Ceremonies are celebrated on the Sabbath Day closest to the birthday of the child receiving the Ceremony. The Sacrament of Confirmation is the Christian Coming-of-Age Ceremony. It is for both boys & girls, & they usually receive this Sacrament approximately between the ages of 12 - 15 years. While Jewish children receive Bar/Bat Mitzvahs individually, Christian children receive the Sacrament of Confirmation in a group. In the Catholic Church, a young Confirmation candidate may choose a Patron Saint for him/herself.
'Another day at the office'