Triumphalism over flags re-opens old wounds
Edmund Burke denounced similar demonstrations of Britishness in Ireland when he wrote in the 1790s: “One would not think that decorum, to say nothing of policy, would prevent them to call up, by magic charms, the grounds, reasons and principles of those terrible confiscatory and exterminatory periods when they established their rule.”
He had little sympathy for these triumphalist versions of Britishness—parades, banners, etc — which reopened wounds and trampled on the rights of other cultures, ie Irish Catholics.