That and because my default position is always anti-nationalism. And I hate the SNP.
British nationalism is okay of course?
Of course not. I never said the Better Together people weren't generally irritating as well. I just don't see the point in giving a bunch of people I find insufferable what they want. Similar to my view of Quebec separatists, though granted Scottish nationalists aren't quite as bad due to that they aren't mostly Gaelic speakers who want to pass anti-English laws and discriminate against Anglophnes, but still a bunch I don't approve of. Also the SNP sucks and I don't want them to control a country for a generation while the Tories are greatly strengthened.
And as far as the North Sea oil goes, it really doesn't matter if it's almost depleted come to think of it, since the economic and technological progress in energy sources is obvious and oil isn't going to be the main source in 20 year. The Saudis and all the other Middle Eastern oligarchs might manage to make due since they can put their large fortunes into investments that'll keep funding them for a couple generations, but an independent Scotland isn't going to be quite on that level. What's it going to do once the oil doesn't matter anymore?