The winner always writes the history books and of course they tend to leave out the unpleasantries.
By the way, the Scot-Irish frontiersmen were prominent in the Texas Rangers--and consequently in the constant 'bandit wars' along the Texas Mexico border. If you look at the rosters, you begin to realize that almost all of them are Scots-Irish names.
In one way, the border troubles took on the aspect of a feud between rival clans of Mexicans and Scots-Irish.
Read the new book on the ScotsIrish by James E. Webb:
Born Fighting or how the Scots-Irish shaped America.