If you are a player you are representing the team while playing, I don´t think you should get the "individual choice" of displaying whatever political views you hold during the game, they should be neutral, they can display the homosexual flag in their own car bump sticker or whatever but not while playing, otherwise every other player is going to want to display the views they hold too, it pollutes sport. Imagine a team, some of them with the Palestinian flag other players in the same team with the Israeli flag, that is not sport, do it in your own house.