Sorry, but in exactly what situation do any footballers try to kill the other person? I don't think even Ben Thatcher was trying to kill Pedro Mendes, so I'm not sure this argument holds up. It wasn't a poor tackle, it was an obvious, deliberate stamp, which could have broken his leg on the last day of the season before the euros, it was really dangerous and a properly scummy thing to do. Completely indefensible.
Don't think you realize the pace the game is played at. It was dangerous, stupid and deservedly a red. I (putting emphasis on that just for you KI) don't think it was a deliberate stamp to break his leg like you're making it. But I'm not going to debate it with you as it's just going to turn into an obnoxious dicussion.