It is you who lack knowledge.So there was no IRA or Irb in 1912.
They just miraculously appeared at the Gpo in 1916.
Your lack of knowledge or just plain ignorance and naivety on the legitimate creation of Northern Ireland shows how biased a version of history was taught in Eire schools.
The position of nationalist Ireland in 1912 is as follows.
Everyone from the most pro-British wing of the Irish Party in Westminster to Patrick Pearse, who subsequently became the leader of the rebellion in 1916, were in favour of Home Rule in 1912.
They spoke off Home Rule platforms in 1912 when Liberal Prime Minister Asquith visited Dublin.
The people who advocated violence were Unionists who threatened civil war against an Act of the imperial parliament and advocated a 'provisional government' in Belfast. It is ironic that it was Unionists which used the word provisional first.
In threatening civil war they were expressly backed by Bonar Law and his conservative party.
They imported arms from Germany.
Northern Ireland was formed as a result.
Despite all that in 1998 Nationalist Ireland voted massively to recognise Northern Ireland until a majority wanted a change.
But Brexiteers have torn up that international agreement.
By denying the facts and indulging in racist contempt Brexiteers are doing major damage to relations on these islands and that is not wise.