If Islam became the dominant religion in Britain, would Britain become an Islamic nation?
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With Muslims forming no more than a mere 5% of the population Islam is already the second biggest religion in Britain.
Your question is interesting because it makes one wonder what makes a nation Islamic. Which nation is more Islamic, one that upholds Islamic values of enlightenment, social justice and tolerance, for example, or one that has a vast Muslim majority but no Islamic values?
"Chilling thought"... that the nation would be ruled by the sort of band of selfish, cruel tyrants we see in parts of the Arabic world, where all the religious, cultural, social and political freedoms we take for granted are swept away by a neo-Nazi regime pretending to speak for God.
Essentially then, the second category you describe!