The U.S. is treating a football referee's decision as though it were a legal or political matter, rather than a sporting decision. Football has always had borderline calls that fans debate for years. Think of Diego Maradona's "Hand of God" goal against England at the 1986 FIFA World Cup, or Thierry Henry's handball that led to France's decisive goal against the Republic of Ireland in the 2010 FIFA World Cup qualifying play-off. Controversial refereeing decisions are part of the game's history, and they have always sparked passionate debate among fans.
In the end, it looks like a more serious form of interference/corruption than the wrongdoing they claim to be correcting.