On one hand, you have to respect this fan for basking in his humiliation and proudly displaying his passport.
On the other, this Manchester United fan really did think he needed to bring his passport in order to enter Wales from England.
To summarise for the geographically non-inclined: England, where Manchester is, is part of the United Kingdom. So is Wales, where Swansea is. No passport required.
There's a reason why the fans serenaded him with "Everywhere you go, always take an idiot with you."
Not the finest hour for the intelligence of your run-of-the-mill football fan.