My understanding is that a quisling sells out his own. The Black Watch were raised to police their own. At that time it was illegal to wear tartan and speak gaelic. It was therefor easier to raise a highland regiment by allowing them to wear tartan, albeit the Government tartan akin to Argyle's and allowing them to use gaelic enabling them to speak to the locals in their own tongue. Such a police force can surley be equated to the actions of Quisling, the original Norwegian nazi informer.