Why Some Jewish People Keep Kosher The rules and restrictions of a kosher diet are part of the Torah, the Jewish bible, which is more that 3,300 years old ( Being Jewish ), and according to MyJewishLearning , keeping kashrut (kosher) is a means of welcoming the holiness of Judaism into a Jew's daily life. The Torah does not offer reason or justification for the keeping of kosher practices, and, like many religious rituals, it's offered simply as a matter of faith. Approximately 7.5 million Americans are Jewish (via Pew ) and around 22% of them, according to Spruce Eats...