Yes but that is life.Sorry about your mother, but unfortunately there will be more cases to come with the way the govt is enforcing the use of French even if the recipient doesn’t understand it. Go figure!
I have worked for many years in a company where 90% of the employees were born in the same country as I was including the owner and let me tell you that the time I spent working with French Canadians was a hundred times better.
It always comes down to individuals not to a certain race or colour. I was lucky enough to travel all over the world live in a few countries and play sports with so many different nationalities.
Racism exists everywhere you just try to stay away from it as much as possible.