I think you may have misunderstood what I said.

I'm talking about the people who act as "tartan police", asking people if they're entitled to wear a certain clan's tartan, and insisting that you're not allowed to wear a tartan unless you carry that clan's surname. That, to me, is snobbery.

There's nothing snobbish about wearing only one tartan (which I do), of course. But the insistence that one must be entitled by surname to wear it is the difference.