There have been quite a few Eastern European musicians featured over the years. Also, some French players too.

I'm quite sure that the organisers aren't consciously racist, white supremists, or fundamental Christians as regards their booking policy.

They don't book much in the way of jazz fiddle either. Nor bluegrass or country music (Bruce Molsky is more of an old time fiddler).

Many of the artists are invited back because they are popular and audiences wish to see them and young Scottish musicians should be given opportunity too. It's The Scots Fiddle festival, after all.

Oh, it's not just a case of "inviting" people. They have to be available to play and, preferably, on tour. Otherwise, the organisers have to spend a great deal of money on transport and accommodation. So, not all artists are cheap. The actual concert fee is only part of the consideration.