How do you feel when people undermine/belittle your intelligence because of your stutter?

How do you feel when people undermine/belittle your intelligence because of your stutter? I’ve noticed that when I meet someone new, they hear my stutter become and sympathetic in a sort of belittling manner. Furthermore, throughout the rest of chatting they seem to come to the conclusion that this reflects my intelligence. I usually take this as an insult, but I understand it. Do you ever feel like this happens?/What do you do?