Orthodox Jewish writings
"Rabbi Ḥanina says: A gentile who struck a Jew is liable to receive the death penalty"
"And Rabbi Ḥanina says: One who slaps the cheek of a Jew is considered as though he slapped the cheek of the Divine Presence"
Sanhedrin 58b
https://www.sefaria.org/Sanhedrin.58b?lang=bi
https://web.archive.org/web/20201014221917/https://www.sefaria.org/Sanhedrin.58b?lang=bi
"If a Jew murders a gentile, he is exempt."
Sanhedrin 57a