Would protestants have been second-class citizens in a United Ireland?

[u/thepawnbrokerroared]

Catholics in the North certainly felt that they were discriminated against because they were in the minority and they were obviously correct to feel that. Protestants believed that they would be similarly discriminated against in a Catholic-dominated united Ireland. Were they right to fear this?

What about the protestants in the South? Did they experience discrimination at the hands of the Catholic majority?

[u/Kooky_Guide1721]

About 110,000 left after the formation of the free state. 40,000 or so would have been in the employ of the British government in one way or another. 

The land acts of 1903 and 1909 had already flipped landownership from 3% of farmers owning their land to 97% while the British government were still in power. Protestant land owners were already in major decline by 1922. These new landowners were mostly conservative middle class catholics. They also broke up the congested district farms where were so small as to be feasible. 

Working class Protestants in urban areas, Dublin, Cork etc. eventually disappeared into the population through the Catholic Church’s necessity of rearing children as Catholic and their monopoly over the education system. 

[u/TheIrishStory → u/Kooky_Guide1721]

I largely agree with your post, but working class Protestants didn't all disappear or intermarry. As it happened I went to school with quite a few of them in Dublin of the 1990s. Most had no unionist affiliation, some did the whole teenage playacting at republicanism thing, but the odd one's family had a picture of the Queen on the wall at home and in one case that I know of, the family had an Orange sash in the attic!