I totally agree too than the physiognomy of a game can drastically change with a wrong call and the final result could have been different like in this Germany England.
If the referee do not send off Zidane in 2006 .... France will have more than surely won the World Cup, Italy was under constant fire (not that he completely deserved his red card but afterall the video was not part of the rules at that time and it s the fourth referee that told the central referee to watch the screen replay and therefore give the red card)