I'm not suggesting anything, apart from not taking any notice of people who say that they would be willing for the IRA to start bombing again just as long as they got to leave the EU. Apart from questioning the sanity of those who think that this is a price worth paying for Brexit:
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Stormont is only of direct interest to Northern Ireland, not the whole of Ireland.
Did you not notice that the GFA is an international agreement, one which required one of the parties to change its constitution to allow it to happen?
Is the unilateral tearing up of peace treaties another thing which you think the UK should do, along with reneging on financial commitments?