Republicanism never was about religion - I give you that. It was about power, pure power and anti-English. Don't kid yourself about equal rights for all citizens (same lie as all countries, come on!). But yes, there was sectarianism towards Protestants in Ireland. You cannot deny that, and basic research will show you that - as you say, it's not a difficult task for anyone who can read a book. Of course, you can debate what level it happened on. Just because it's inconvenient to you, doesn't mean it didn't happen.
OK, so you are calling out 'tripe' - what about the tripe in what you say? (you know what you say about the GAA is simply not true?) I have my own hopes for the future of Ireland, but I can leave my private beliefs out of what I say, to try to come to a truth, however inconvenient that is. Can you?
In my experience, I find the vast majority of loyalists are full of rhetoric and do not know their history (David Irvine (not the holocaust denier), in private, an exception). I find many Republicans know history pretty well, much better than the Loyallists, but they tend to forget one or two 'inconvenient truths' which makes things very black and white for them. Not many of them know what life is like in a loyalist area, their concerns, their worries - simply because they don't care. It seems they think they have had the monopoly on suffering and discrimination is one-sided. Let me tell you, from someone who has lived in many communities, worked with politicians and political groups, lived in the filth and fury, and finally left it all behind - in case you didn't know - it is not. The Unionist sectarianism was obvious, and historically blatant. Nationalist sectarianism is alive and well. The Unionists are horrible at PR. The Nationalists and Republicans always
Even worse - the romantic Republican from the South, who hasn't seen any bloodshed, who hasn't seen family members blown to bits - They think they're the same as us? Dream on. They're not. They haven't earned that through suffering, at least not for a few generations. You think Nationalists in the six counties are the same as the ones down south? No, actually, and I hate to tell you but many look down their noses at them. The 'Irish' people there are NOT the same as you - it's like saying a British-born Asian is the same as a Devon cider farmer. You're saying two brothers can be split for nearly 100 years, and then reunited and be the same? No. I wish what you were saying was true, but it's not.
The real history and facts isn't just one narrative. See both sides of the coin (if you can be bothered looking past loyalist rhetoric, because there is a lot of it) and embrace the whole truth, even if you find some parts of it unpalatable. Otherwise, you're just seeing a fantasy you want to see.
Brushing up on the history IS a difficult task - if you haven't lived it. I'm sorry, you appear to me to have an over-romanticised view of Republicanism in practice in Northern Ireland. Such views are unfair because they give the world a distorted picture of the way things are - such views encouraged funding of the IRA from America, as many were led to believe that Catholics didn't even have the vote in the 80s!
Northern Ireland is not a silk purse, it's a sow's ear like you say, it's a historical insult - supposedly the 'kindest cut' yet a cut all the same - yet more and more people are calling themselves Northern Irish, and these aren't just disillusioned loyallists. They realise:
- they are not like their Southern neighbours, and they don't always like them that much
- they are proud of where they live, despite its faults
- the politicians benefit financially from Stormont and Sinn Fein get to be a big fish in a small pond.
So, I think Northern Ireland will survive for A LOT longer than you think. Repeat after me - Ireland - what is Ireland, but a piece of land that keeps my feet from getting wet?