The British isles is the name of the island chain anyone from one of the islands in the British isles is British in the same way a Cuban and a Haitian are both Carribean or a German and a Frenchmen are both European

Also the Scottish claiming to not be British now that being British carries with it stigma for colonialism is bulshit as the Scottish were more than happy to be British when being British meant they were enabled to go out and rob the world it's only now the bill has come due that they are protesting not being involved