Not sure how you arrived at that, but in the words of Foghorn Leghorn, "You're way, I say, you're way off, boy." I'd need to know how you define 'Celtic', but in that I can assist. Celts are basically those who speak Celtic languages. These would be both Irish and Scots Gaelic, Welsh, Breton, Cornish and Manx. The Picts and Gaels would be two groups. They formed the Kingdon of Scotland in the 9th century. Of course, as history proceeded, other peoples began to inhabit the Britsih Isles and elsewhere, but to simply dismiss Britsih, Irish or Welsh Celts as nationalists is simplistic and, frankly, facile. I have many friends who use Celtic languages regularly, and a handful of them may want independence for thei nations, but again, and this probably says more about you than it does them, they never use words like 'nationalist'. That's usually the preserve of those who oppose self-determination for certain peoples. The UK is not, whether those like you want it to be or not, a homogeneous mass of people sharing a culture. I am a Scot by birth and British by default. It wasn't a choice I was given. I am not English any more than you are Scottish. I'm also not Welsh, or Irish, or Cornish, or Breton, or even Manx. I don't think I can even describe myself in the truest sense as a Celt, but I certainly spring from Celtic culture. The nation to which I belong was in fact, from its inception as a nation, truly Celtic. That has changed, but you cannot deny me that with your parade of sheer ignorance.