Interesting translation.
Yes; it is.
In that part of the world, it is STILL an INSULT to call someone a DOG!
'Normal' Jews would have NOITHING to do with them (John 4:9)
The term "Cuthim" applied by Jews to the Samaritans had clear pejorative connotations, implying that they were interlopers brought in from Kutha in Mesopotamia and rejecting their claim of descent from the ancient Tribes of Israel.
Samaritans refer to themselves as Bene Yisrael ("Children of Israel") which is a term used by all Jewish denominations as a name for the Jewish people as a whole.