Joseph,
Based on your line of reasoning, we should all be speaking Lashon Hakodesh and certainly not a linguistic hodgepodge from anti-Semitic Germans, Poles and Russians.
I’m sure you’re familiar with what Harav Moshe Feinstein, zt”l wrote regarding the names used in Mitzrayim, that it was a necessary way of distinguishing themselves there since they hadn’t yet received the Torah.