Stu can I gently point out the The Scottish National Party is absolutely NOT a 'nationalist' party in the way Ukip etc are!
Perhaps if you have time to listen to the few occasions the SNP members of Westminster parliament are allowed to speak you might get a flavour of who they are, what their policies are.
They are a party of social justice. of inclusion, of respect for all. In the Holyrood parliament they have fought to minimise the dreadful effects of Tory austerity on the citizens of Scotland, to protect the Scottish NHS from the cuts being experienced elsewhere in the UK and many other measures, to support further education for all those who aspire to it - Nicola Sturgeon is First Minister for all of this country, not just those who voted SNP.
You won't see much / any of this reported on msm, particularly not BBC or most of the press - and I don't expect The National is available outwith Scotland (tho you can subscribe online.
There are some facebook sites that offer accurate information / discussions - the SNP's own pages, also Bella Caledonia and (usually!) Wings Over Scotland.
Catalonia and Scotland, tho having different political and constitutional backgrounds, are soulmates, empathise with one another.
If you have ever seen The Tartan Army abroad supporting the Scottish Football team (on the few occasions it makes it to matches outwith the country!) and contract them with the skinheads who 'support' - or used to - the English team - you will begin to get a sense of what the wider Independence-supporting population is like- happy, positive, enthusiastic, sharing. There were and are wonderful rallies and marches in Glasgow and all over the land, not in the least threatening but happy bands of people hopeful of achieving their liberation.
Come and join us, feel the joy, lots of humour - - it is wonderful! You might be able to find some samples on facebook or youtube - like when the 100 MPs (Labour?) came up on the train to walk from Glasgow Central rail station to The Buchanan Steps (which have become an iconic rallying point. A chap hired a rickshaw and driver, sat in the back with a loudspeaker and mike, sound system blasting out the theme from the Empire Strikes back, chap calling to the citizens of Glasgow to bow down before their imperial masters, your imperial masters are here -- he did this alongside the band of MPs all the way through the streets, they didn't know how to deal with it! Soooo funny.
The unionist parties have worked hard on Project Fear, but we won't be fooled by it again! (I sincerely hope----)

NB Teribus- - I know it was a précis BUT - the Scots were already a nation, a kingdom and had been for some considerable time before Edward came up here to try to take us over in 1314 (?) only to be sent scuttling away by Wallace and Bruce. So that war was not to win independence but to defend it!