No, I don't find this insulting. It's actually kinda cute.
From Chicago Magazine -
A Downstate Illinois Dictionary
South of Chicago, Illinoisans speak with a distinctive Midland accent and a lexicon all their own. Visit armed with the local lingo.
One of my favorites:
Carbondalay
Faux-pretentious pronunciation of Carbondale, home to Southern Illinois University, where a lot of Chicago-area students are studying 300 miles from home. Like calling Target “Tar-zhay.”
And pretty darn cool to see that Cheese Toastie made the "dictionary".
Grace & Peace & Love to you all -
Matt