"Dont understand that we have a slur for you"
“Goyim” discourse is stupid.
Every group has a term for people who aren’t in that group—goy, kafir, gaijin, gringo, gora, aüslander, heathen, infidel.
Some of the terms are always pejorative (kafir), and some are neutral-ish but can be used pejoratively (goy).
Calm down.