Scots regarded English execution of Mary as theft of a native privilege

Evidence

It is awkward, however, for a king to have his mother the victim of a public executioner, and not least awkward for a king of Scots whose turbulent people did not relish seeing their ancient privilege of exterminating their own kings usurped by the hereditary enemy across the border. — Garrett Mattingly, The Defeat of the Spanish Armada, 62

Categorization

• XREF: Darkly comic historical aside about Scottish regicide tradition - fits the reader’s taste for surprising historical details.
• corroborated: 2 independent passages support this claim — Garrett Mattingly, The Defeat of the Spanish Armada, 62