The Red Devils have just completed a marathon pre-season tour, which included stops in Bangkok, Sydney, Japan and, finally, Hong Kong.
"Our description is the heartbeat is in Manchester, the pulse is all over the
world and people who are well versed on Manchester United's history will know
this isn't a recent phenomenon," Arnold said.
"We have been visiting Hong Kong alone for 40 years. In 1950, Sir Matt Busby went by steam ship on a four month tour of America.
"We were the first team to play in Europe and Sir Matt took some criticism for that. It would be great if every fan were able to get a ticket for Old Trafford but the reality is some people live too far away.
"I am acutely aware how important the fans who come Saturday-Wednesday-Saturday are. But those people know they are supporting the biggest club in the world. That club has fans in every corner of the world. They are as proud of that as I am."
That they played to capacity crowds everywhere underlined the Red Devils' global appeal, that United took with them a large commercial staff confirmed a desire to turn that fervent support into hard cash.
Arnold is the man widely credited with the explosion of United's commercial income, which could be as high as £150million when annual figures are announced later in the year.
It is praise he prefers to spread around.
"I stand on the shoulders of giants," he said. "We are every bit as much a team off the pitch as we are on it."
Nevertheless, it is why this exclusive interview is taking place in an office on the 28th floor of a building close to the waterfront in Hong Kong with magnificent views across Victoria Harbour.
It also has a mock dressing room - with kits - trophies on display and an office designed in such a way communication can be made with Manchester and the USA and it appear the person on the other end is sat in the same room.
"Asia is a hugely important part of the world for us,'" said Arnold.
"We have 330million fans in Asia and 110million in Greater China alone. It makes sense to have a base here to build those connections and make sure we are able to connect those fans back to the club."
Major sponsors Aon also have a base in Hong Kong, which is significant.
After all, it is not widely known that a company that specialises in risk management and succession planning played an integral role in the process by which both chief executive David Gill and manager Sir Alex Ferguson have been almost seamlessly replaced in a single four-month period.
"With a fan base as big as ours and a media exposure as big as ours, it works well for us, " said Arnold.
"It means we can connect with fans through businesses like Aon and do stuff together with their clients."
If hostility at their controversial leveraged takeover in 2005 was huge, the Glazer family evidently had the foresight many others lacked.
They saw in a digital era, when consumers are becoming increasingly discerning about what they watch and when, sport has a unique ability to bring people together.
Of sport, football is the most popular. In football, the Premier League is globally the most watched club competition. In the Premier League, Manchester United have no equal.
Arnold explained: "With a team as strong as ours, with the fan base we have and the connection that generates around the world, we are just taking baby steps.
"Each time we have had this discussion we have gone on the next year to show that is the case. The connections we have with fans, the brand ranking we have, the strength off the pitch and what that enables us to do on it, are all going from strength to strength.
"These tours just remind you how far from the standards we are setting ourselves that we are in each country in terms of having that engagement with the fans, knowing exactly who they are and communicating with them through the media channels we have.
"Coming back, I have a longer to-do list than when I arrived. There is so much more we can do."