And as no one meaningfully important has put forward a plan about what sort of exit Brexit is going to take, that unknown is very uncertain indeed. Long-term things like real estate investment and corporate mergers are on hold, EU students going to British colleges are wondering if they'll be allowed to complete their university education (probably? but still) and vice versa...
On this side of the pond there's a mindset where people say the US Constitution is not a suicide pact. There is an analogy to EU membership. There's no glory or honor in riding a sinking ship to the bottom. Better to be the first guy out than the last.
Otherwise, ... do you have anything substantive to offer beyond being rude?
I'm guessing you don't agree with his thinking. When you are on your deathbed, I'll give your opinion equal credence.
I have the utmost sympathy for the plight of the chronically ill, but to decree a referendum result as "madness" is slightly egotistical.
Perhaps those who are outraged by world events merely don't see the full picture? Perhaps their protective shells work too well, and they are insulated from the reality with which the masses must contend?
Worth pondering.