Windows HM Forces are always on stand by; it's what they do.
Politics is a mess in other EU countries as well, certainly in Spain and Italy. Macron isn't doing too well in France either.
Not all companies are 'fighting to leave' the UK. When are Amazon, Sky and Starbucks going? JCB seem to be staying as well
If by 'our Irish neighbours' you mean the ROI, then look at Varadker. Kenny had groups going between Dublin and Westminster to work through the issues Brexit would throw up, but Varadker cancelled them all. The ROI is doing what it wants, as is the UK.
If you mean NI, the Troubles weren't solely of British making iirc?
What kind of Brexit to have? Well, had the backstop not been in the WA, and the supposition that the CU would be the basis for any Trade Agreement, then the WA might have got through. Had the PM put preparations in place for no deal from the time she sent in the A50 letter, then the EU might have taken her a bit more seriously. Had the House not voted overwhelmingly to honour the result of the referendum, then reneged on that commitment, who knows where we would be?
The EU has form for deals at the very last second. It's a case of holding your nerve.
I really don't think the world is 'watching in horror', and I am outside the UK. Brexit is hardly Syria.
Voting remain wasn't voting for a predictable outcome either, so please tell me where the UK would be in 10/20/50 years had the vote been to remain? At what point, given moves to QMV and the death of the veto, would enough be enough? Conscription into the EU Armed Forces for your kids? Having to adopt the Euro? Direct taxation by the EU? Changes to Inheritance laws so they are the same throughout Europe, so you no longer can leave your estate as you wish?