There's a big difference between nationalism and patriotism. Nationalism seeks to promote a nation to the disadvantage of other nations. Patriotism seeks to promote the welfare of one's own nation and community - not necessarily to the disadvantage of others.
The SNP (Scottish National Party) certainly seeks to promote the well-being of Scotland - by pushing for it to remain in the European community of nations, despite England's more isolationalist stance.

-Joe-