LuL Sac ofc football clubs are globalized and commercialized today but that is not why people support their football team. You're making the example as a way of criticizing people for not wanting to follow their "local team" that we should because football is the same when English football clubs all have a heritage and connection with their local communities, sons bring their fathers to games, my Dad got me into football and supporting my team and I don't follow my team because they are successful but because they are my team.
Franchises will never have the same appeal to people from Britain than they will do Americans, even if the London Spitfires won everything I couldn't care less, they have zero connection to my locality, my country. If they want to attract a fanbase based on locality they should tried recruiting at least one British player and made him the face of the team, to me that just seems like a good PR move, because like it or not people connect more to people of the same nationality when they're looking for someone to follow.
And this rhetoric attacking football supporters sounds like you got some issue with the modern workings of football and how supporters act, luckily for me none of it has anything to do with my point so I can dismiss it and sleep well.