They are English Nationalists who care not a jot for the Kingdom, BoJo's 'deal' makes it obvious.

[Denzil_DC]

1. The question of Northern Ireland seemed an obvious problem to many of us

from the moment the prospect of Brexit became a reality (similar problems arise from the long-proposed repeal and replacement of the UK Human Rights Act 1988, as the Good Friday Agreement incorporates elements of the European Convention on Human Rights), but sadly next to no one in government.

It became even more of a problem when May had to buy off the DUP to cobble together a majority.

Since Johnson hasn't got a majority for anything even with the DUP's votes, it's hard to see why the government's still clinging on to them. If they abandoned that tack, there might be more scope for seeking the votes of other MPs for an agreement, and probably more than the DUP could offer.