This article argues for a re-evaluation of the ‘Islamist’ policies of the Mughal ruler Aurangzeb ‘Alamgir (r. 1658–1707), many of which were arguably harsher towards Shi‘i and millenarian groups than towards Hindus. By charting Aurangzeb's trials of millenarian leaders throughout his long reign, it suggests that the emperor's desire to introduce a more standardised legal system was at odds with the ‘millennial’ nature of his own kingship. The article further suggests we should look more closely at the influence of regional politics on Mughal policy-making. The fact that Sunni Gujarati clerics acquired a remarkable intimacy with Aurangzeb, both as prince and emperor, demonstrates how Gujarat's sectarian disputes and political economy could play out in the imperial court. Finally, the article calls for a realistic reappraisal of the long shadows cast by Aurangzeb's Islamist legalism.