I don't think him or anyone claims he's a historian, but what's he said wrong about the clearances?

He is an absolute gem of a man.

See Neil Oliver and diamonds?  One and the same.

He has often claimed to be a historian and still does so on his website, though his twitter says he isn’t one.

His friendly Yoon media often present him as being a historian.

His take that the Clearances weren’t in fact clearances but people shipping off for a bit of adventure and derring-do is a bit of an outlier.