The EU would not allow the UK to break its agreement with EU member Ireland that there should be no border between Ireland and Northern Ireland. Heck, even the Americans are on the Irish side of that particular dispute.

Northern Ireland is recognised as being part of the UK as per the Good Friday agreement.

There is no agreement at all that there would be no border between NI and the ROI.

Even when we were part of the EU, the UK (including NI) and the ROI were separate countries with separate laws, currencies, taxes and languages. There was a border when we were part of the EU and there's still a border now.

NI is recognised as a "contingent" part of the UK. (contingent because as a gerrymandered legacy colony imposed on the Irish people it is a disputed territory).

There certainly is an implied agreement that there will be never again be a hard border with customs controls. Both govts accept this and the UK parliament voted for the NI protocol because of this. Disputing this is simply absurd and pointless. Pointless because the days of unionist dictation to the rest of the population are over and they won't be coming back. Get over it.

Utter claptrap. The UK govt announced its intention to abrogate the withdrawal agreement. The EU did not renege upon the agreement -- which specifically includes terms about the EU's rights to punish non-compliance. And the UK's "compliance" included repeated unilateral abrogations.