Hmmm. Speaking as a native of Glasgow, I'd respectfully say this isn't true. Salt of the earth, I'd maintain.
BTW fun fact. "Scotchmen" was OK in the past: my Dad told me they'd call themselves "Scotch" in his youth. However, it's considered incorrect now so "Scots" or "Scottish".
So....Harry. Is there a story to go with your OP? I don't get the image BTW.
cheers donald