Original sentence: Although Christianity began as a sect of Judaism, these two religions diverge in a fundamental way.Christianity places emphasis on belief, focusing questions on how each person receives the Covenant offered by Jesus.Judaism places emphasis on actions, focusing primary questions on how to respond to the eternal Covenant their nation received at the Biblical Mount Sinai.Judaism's raison d'être is to carry out what it holds to be the only Covenant between God and the Jewish people
Edited sentence: Although each have their roots in Second Temple Judaism, the modern forms of these two religions fundamentally diverge.Christianity places emphasis on belief and practice, focusing questions on how each person receives the Covenant offered by Jesus.Rabbinical Judaism places emphasis on actions, focusing primary questions on how to respond to the "eternal" Covenant their nation received at the Biblical Mount Sinai.Rabbinical Judaism's raison d'être is to carry out what it holds to be the only Covenant between God and the Jewish people