"I do not believe for a second that Oliver Cromwell made any distinction between English Rebels, Scottish Rebels or Irish Rebels, he sent them all to the West Indies as slaves if captured."

Her certainly did - his hatred of the Irish is well-documented. He may not have been alone in this during this time but I think you'll find the Irish see it very differently and I agree with them.

" His troops behaved as any others would have done at the time considering it as being perfectly normal, although I note he did stipulate in his orders that only those under arms were to be killed."

No, they behaved like animals at the end of the siege of Drogheda and killed 80% of those inside, including many innocent people (source), and there was a clear distinction between his treatment of the Irish and the Scots and English.

"This arrangement has held England and Scotland clear of the machinations of troublesome Popes throughout history since Henry VIII broke with Rome and established the Church of England, I see no good reason whatsoever to alter that state of affairs."

Damn those Catholics eh, Tezza lad? Centuries of persecution and misery to be upheld because one fat old git with an oversize ego was incapable of getting his unfortunate wives up the duff with a boy?

Perhaps an end to these centuries of intolerence might be one good reason - after all if ditch the monarchy, establish a republic and elect a head of state we won't have any obligations to any religion anywhere, and that can't be a bad thing.