That tackle was bad but it didn't warrant a red card. Yellow and a citing at most. It ruined the spectacle of the game...which France were very lucky to win.
I heard an interview with a French fan who when told that they never play 2 good games in a row said "France will beat Wales but play badly...then, the week later, they play good! Tres bien"
Don't ever write off the French. Kiwis of all people should know that.