They don't have a visa to enter Russia, and cannot stay there. Wouldn't a reasonable solution then be to send them back to where they came from?
That doesn't have to be racist, and I cannot read anything into that story that says it was. Russian security isn't nice (I know, I've been kidnapped by them and locked into a hotel by armed guards - that was the last time I ever flew aeroflot) but not everything is a racial issue.