Ethnic Cleansing?

My forebears were protestants and came from County Cork where I understand most Irish protestants live to this day. I have also been told that over the last 20 years or so the percentage of protestants living in the Republic has reduced from 10% of the population to 1% most of whom work in the financial services sector. Why do these protestants live for the most part in West Cork? Why has the number of protestants living in the Republic diminished to the degree it has? Do protestants feel uncomfortable living in the South? Has there been some subtle ethnic cleansing? Has the emigration instead happened for economic and family reasons? Is it a bit of both? It would be interesting to know and to find out to which countries the emigrants will have gone to. I would suspect mainly to the USA and other English speaking countries like Australia, Canada and New Zealand and even to the UK. Despite the bombs and bomb scares the Queen's visit has started well and it is to be hoped that the Tories do not make the same mistakes relating to Scottish independence as they made in the case of Ireland. It would be an acknowledgement of better relations between the two countries if Ireland's return to the Commonwealth could be discussed. De Valera's decision in 1948 to leave was a monumental mistake, particularly as if you scratch most Englishmen a bit of Irish blood will seep out along with Scots, Welsh and English blood. The English are a mongrel lot. Who else would have a Syrian as their patron saint?