I'm trying to think of any other country where the adjective for a nationality is different from the term for a native - Germans are German, Americans are American, English are English, Irish are Irish. The only other exception I can think of is Argentina, where the Argentinians live.

And if French and Dutch are OK words, it's a bit hard to see why Scotch should be a problem.

Still, if Scots prefer to be called Scots, that's their choice, and I'm happy enough to comply. So long as I don't have to start talking about "Scottish Eggs"...