FWIW, my family didn't get the memo on the Anglo-Gaelic animosity. The best quote is from a history book where almost 200 years of English ancestors are touted, until two of the daughters married Matthew & John McCue. In its own little paragraph stands the damning phrase: "The McCues were Irish."
Not even a "bless their hearts" to tone it down a little!
They all did get the memo on grammar and private schools, though. Didn't want to mix with the riff-raff, don't you know?