Anyone who is taught fear of the other will belittle and dehumanize them. This will cause them to disrespect, after all he/shee is only a “fill in your term here”.
Both yeshivish & non-yeshivish families can dehumanize others.
I have seen it done here by some posters, and have called them out for it (specificly for using a term for non whites).
But those who push the fear of the other (which we see many times in both Yeshivish & non Yeshivish families) will “encourage bad middos” towards those other groups.