Rather, I'd assume the SNP are delighted with Corbyn's victory. I know I would be, if was in the SNP. Their genius is that they combine triangulation with Corbynite rhetoric when it suits them, which it did in the West of Scotland. They are the Blairite party par excellence in UK politics today and it is, to me anyway, utterly inconceivable that a Corbyn-lead Labour party will be a match for them. Instead, the script is going to go something like this, "We disagree with Jeremy Corbyn on some things but we're both against austerity and Trident. Look what happens to someone in England who shares these views we've been so awesomely successful with in Scotland. Look what happens to him in his own party! Just shows how very different our two nations are..."
Here's a preview. This is the line we'll get on a loop.
If Lab can't quickly show that they have credible chance of winning UK election, many will conclude that Indy only alternative to Tory gov— Nicola Sturgeon (@NicolaSturgeon) September 12, 2015
The SNP's path to the mainstream - supporting EU and NATO membership - is now more difficult for the Corbyn Labour party, whether he comes out in favour of these or not, and that is the state the Labour party has got itself into.