Its not often that I agree with Nick Robinson but he pretty much sums things up rather well here.

Nick Robinson
✔ @bbcnickrobinson
The Irish border problem is summed up by
@BorisJohnson as “
essentially a technical discussion of the exact nature of customs checks.” The EU see it as about peace in Ireland, defending the European ideal & the single market. This gulf in understanding may not be bridgeable
The fact that Johnson has managed to by the bigots at the DUP by offering to move the border checks to 5-10 from the borders pretty much tells you all you need to know about the DUP. Either Johnson has had them all round his for a crack smoking session or that they have just given up on the Good Friday Agreement altogether.