Same i recently moved to a new city and people here are horrible and think making fun of Stutter is a Joke and if i don't like it then i am childish and doesn't understand humor , i tried to tell them that it is Clear sign that you don't respect because i told him that it isn't a Joke for me . Something is considered a Joke if Both Person enjoy it and don't consider it as Disrespect. But it didn't work out and they still mock me daily and i instead choose to laugh with them and Make jokes on my Stutter . Since i started doing it , they aren't enjoying it anymore and have started to respect me more . All you need to do is be confident and Don't let them see that your Stutter is your main Weakness .