Does Phillips explain this? Was there some class difference in the opponents that interfered with reconciliation? Was it perhaps the nature of the fighting, up close and personal? I know little of English history. That the opponents of Royal authority in each case were townsmen is consistent with the rural folks staying out of the fight, or wanting to, anyway.
"Highland Scots in the Carolinas, a fair number of Anglican clergy and their parishioners in Connecticut and New York, a few Presbyterians in the southern colonies, and a large number of the Iroquois Indians stayed loyal to the king."
(Middlekauff, Robert. The Glorious Cause: The American Revolution, 1763–1789 (1985), p 550. }
"Some recent arrivals from Britain, especially Scots, had a high Loyalist proportion. Loyalists in the South, however, were suppressed by the local Revolutionaries who controlled local and state government. Many people — such as some of the ex-Regulators in North Carolina — (One of my ancestors, John Boring, was a Regulator and fought in the Battle of Albemarle. He was declared an outlaw by Governor Tryon.) - refused to join the Revolutionaries as they had earlier protested against corruption by the local authorities who later became Revolutionary leaders. Such pre-Revolutionary War oppression by the local Whigs contributed to the reason that much of backcountry North Carolina tended to be loyalist"
(Calhoon, Robert M. The Loyalists in Revolutionary America, 1766-1781 (1973),)
Apparently, nothing is as simple as we sometimes think. Stan