Ah, Philip Wigle. No doubt he was a good friend of David Bradford.
The Whiskey Rebellion
is now only a footnote in our history, but it is a fascinating one. Here's a quick summary: http://en.wikipedia.org/wiki/Whiskey_Rebellion
Then, generally speaking, the Scots and Protestant Irish who populated Western Pennsylvania, were reletively "recent" immigrants to America, were of a "clannish" nature, and settled west of the Alleghenies which then were a major physical barrier to trade with the eastern seaboard. For many of them George Washington himself was their landlord.