These are my final words on the childish Irishmen-hate-Brits relationship; It's called "The British Isles" for a reason, England wanted to make Ireland, Scotland and Wales a part of their kingdom, the UK, so far they've only conquered a moderate chunk of Ireland at this point, my point is that most of the inhabitants of the British Isles except the English are of Celtic ancestry (Europe was mostly Celtic long ago) and red hair in comparison to population is mostly common in this order if I remember correctly;
3. Wales.
2. Ireland.
1. Scotland.
I saw a survey online about drug abuse in the British Isles, and both the British and Irish teens were among the worst in the world to abuse alcohol, tobacco and drugs (opiates and the like), Ireland has also a pretty similar drinking culture as England (the UK), football is also extremely popular there, and many of the slang words are similar to the British ones; Twat, cunt, chav, arse etc.