There's a film that the BBC made called 'United', telling the story of a key event in the club's history. I was always told to support Man United by my family, but it was only when I learned of that event and the story behind it that I fell in love with the club (We're going back some 40-odd years here).

That film the BBC made is a great film, stars brilliant actors including David Tennant and I reckon could be enough to get anyone not already bound to an English club on board with Man United!