YES.
The IRA want this.
They are Freedom fighters.
The Real IRA are a breakaway group from the IRA that did not agree with the IRA's policies in the peace process. They are still an active terrorist organisation, though quite small.
The terrorist group called the Real IRA, which is different to the IRA. They were a breakaway group that were not in favour of the peace process that was going on at the time with the Good Friday Agreement having been signed a few months earlier.
There have been a number of them, with the main being the IRA (Irish Republican Army).
Because of their terrorist activities.
Lots of people supported them, from people in the local area to support from other countries like Libya and the United States of America.
The IRA are not committing terrorist acts. That has finished now. They did commit them in an attempt to create a united Ireland by removing the British influence in Northern Ireland.
Over 3500 people died in the troubles, but no single group killed over 2000 of those. The IRA (Irish Republican Army) killed around 1700 and were responsible for the most deaths of any single group. The IRA were not the only Republican terrorist organisation, as there were many others, which worked individually and separately. If you take what they all killed, including the IRA, then the total would be over 2000. However, the definitive answer to your question is that no terrorist organisation was responsible for over 2000 deaths in Northern Ireland.
Osama Bin Laden, Adolph Hitler, The IRA
How did ISIS become such a wealthy terrorist group
The IRA in Ireland has existed for well over 100 years