The fact is that Catholic as well as Protestant colonies contributed militia forces to the French and Indian War as they had to do it for: 1. Their own protection, particularly from the Indians allied with the French. 2. As colonies of Britain, they were required to fight the enemies of the Crown in their territory. 3. The Congregationalists fought alongside Roman Catholics and Anglicans in the War for Independence. Your theory that the Congregationalists wanted to drive out all Papists, and that is why we fought the French and Indian War is erroneous, as there were already Catholics in the other colonies. John Glover was a fierce Congregationalist in 1776, and an officer in Washington's army, fighting alongside Catholics and Anglicans. Glover's Massachusetts fisherman took Washington across the Delaware in 1776.
Sure the French were Catholics, so the Congregationalists wouldn't like them, but the Congregationalists also had disputes with Anglicans, Presbyterians, and other denominations. Numerically, Congregationalists were a minority in the nation as a whole.
The information that I posted on this thread about the French and Indian War is from
Crucible of War: The Seven Years' War and the Fate of Empire in British North America, 1754-1766, a
book by Fred Anderson. You really should read it, and then you will appreciate what I am talking about.