A cultural grievance is deepening Iranian resentment toward the US, a small but telling piece of the bigger Iran-US tension.

• Iranians felt insulted by how their World Cup team was treated in America.
• The team was not allowed to stay in the US overnight, forced to fly in at dawn for matches and fly back to Mexico afterward.
• Many of the team's support staff were blocked from entering the country entirely.
• In Iranian culture, hospitality is a core virtue, so the snub landed as a deep national insult.

Outlook: This anger adds to the ill will between Iran and the US and could harden Iranian public opinion against America going forward.