This person sounds like an angry Labour hack. He's attacking the SNP for not magically getting everything done while in power. I doubt he would hold his own party to the same standard.
If you're the type of person who won't vote Democrat because Obama is a sell out, yes, you should be wary of the SNP.
If you're a reasonable leftist though, you should be excited by their success.
Yes, the idea that the post Blair Labour Party is somehow a much better vehicle for Social Democracy for Scots is laughable. Maybe this is just my background showing, but I really don't get the progressivism behind this notion that British governance has a monopoly on progress, which is what many anti-SNPers imply with their "keep Scotland British!" talking points.
Seems more like the 19th century colonialism to me than anything.
It's not that British governance has a "monopoly on progress" or anything like that, it's that the SNP's agenda is fundamentally at the whims of North Sea oil royalties, which anyone with half a brain should recognize as
not a very well-thought-out plan, given the reality of super-low worldwide oil prices right now, as well as the fact that said North Sea Oil ain't gonna last forever.
And, uh, back in the day the Scots were some of that island's most eager colonizers.