the highlighted part is where you have made a leap, there aren't just 2 options ban the player or the flag, how about allowing the player and the flag?
ukraine playing russia in football should also be allowed, iraq had to play australia at the 2004 olympics, in 2005 and again at the 2007 asian cup, nobody was banned
these scenes might describe people simply happy that their country won a big match but i remember these games being politicised, many references to iraq playing an invading country and when they went on to win the asian cup their players had to publicly shut down george bush who tried to take credit for the win