"'Nationalism is but one step away from racism and fascism,' (Smokey)...
it is to mis-led pro-immigrationists like you or, at least, you deliberately try to paint it that way, because you don't like immigration being questioned"

To be precise WaV, I don't like YOU questioning immigration on proven racist grounds, repeatedy and in the faces of people you know perfectly well it will offend, whose minds you know you will never change, and who are tolerant and generous enough to allow you to do it ad nauseam. That is a privilege, earned on your behalf by others, and with any privilege comes responsibility. You'd do well to try and understand that principle, because ultimately it is fools like you who cause the loss of such privileges for others in the real world outside your unpleasant little bubble. (I refer to 'privileges' rather than 'rights' as, sadly, we do not have a Bill of Rights in this country.)

"and, in saying that, you not only offend me

You honestly think I care? Go ahead and take offence - it may just make you think.

but all the many members of Plaid Cymru, the SNP, etc.

Why? I can't speak for the Good members of Plaid Cymru, but I know plenty of SNP voters - and quite a few of those are English. I doubt very much if I could find any who would agree with you on the issues under discussion here. I suspect you don't actually know what 'nationalism' means.

Nationalism with eco-travel and fair trade, rather than greedy imperialism and conquest, is NOT racist or fascist

I didn't say it is, I said it is one step away.

and, further more, I'm very sure it will make our world a more peaceful interesting place."

To achieve that, we need to do everything we can to render our 'national' boundaries unnecessary, not just build bigger walls with more restrictions. Your way would merely perpetuate the permanent state of war which the planet currently endures.