Share a personal experience of having trouble with your name due to your Scottish background and express frustration over the lack of spellings and pronunciations it receives. Also, clarify that the rudeness is limited to a specific individual rather than the entire country.
This was already posted in Huff Post Black Voices. 
I'm a fifth generation Canadian of Scottish background. 
Immigrants can never say my name nor spell it. Even 'old stock' Canadians have trouble spelling it. Who can I complain to?
One idiot was rude to him, not the whole country.