I remember the 1994 World Cup in that match between Colombia and USA where USA had to win with 2:1 scores courtesy of an own goal from the Colombian Andres Escobar which was believed to have made USA won that game leading to the disqualification of the Colombia to the next round. It was gathered that Escobar was shot dead while inside his car days after that game.
I followed that match when it broke. It was my first time seeing an own goal. I felt pity for Andrés Escobar on the pitch as his demeanor changed immediately that happened, showing it was an honest mistake on his part. His assassination, therefore was a shock as the loss was taken too far. I would've felt really bad if I had a bet on that game and lost it because of that own goal. Anyway, the hurt wouldn't have felt any different if the loss happened in a different way. Loss is loss. There's no happy loss.
3. Do you curse the player for that?
Well, is there any spectator/fan who doesn't curse when their team is losing? I doubt.