Here is a scholar's (whose learned analytic opinion is that both Xitian and Islamic scriptures are plagiarised versions of Judaism) take on their greetings:

Even the Muslim greeting Salam Alaikum is plagiarised from Shalom aleichem.

Shalom aleichem (/ʃəˌlɒm əˈleɪxəm, ˌʃoʊləm-/;[1][2] Hebrew: שָׁלוֹם עֲלֵיכֶם, šālōm ʿalēḵem;

Hebrew pronunciation: [ʃaˈloːm ʕaleːˈxem]) is a spoken greeting in Hebrew, meaning "peace be upon you". The appropriate response is aleichem shalom ("unto you peace")

(Hebrew: עֲלֵיכֶם שָׁלוֹם).[3][4] The plural form "עֲלֵיכֶם" is used even when addressing one person.

This form of greeting is traditional among Jews throughout the world.

The greeting is more common among Ashkenazi Jews.