Apparently, there was some rules changes taken into affect on June 1st. Copa America, along with the Euros are the first two tournaments we'll see these rules being enforced.How the actual fuck is a half-hearted, two-way shoving match with an incidental brush in the cheek a straight red on Jones (but nothing on the guy who instigated it, Pareda), but a fucking studs first karate kick at Wood's head is a yellow (again, by Pareda).
http://www.fifa.com/development/education-and-technical/referees/laws-of-the-game.html
Laws of the Game, section 12 - Fouls and Misconduct - page 88:
Violent Conduct
Violent conduct is when a player uses or attempts to use excessive force or brutality against an opponent when not challenging for the ball, or against a team-mate, team official, match official, spectator or any other person, regardless of whether contact is made. In addition, a player who, when not challenging for the ball, deliberately strikes an opponent or any other person on the head or face with the hand or arm, is guilty of violent unless the force used was negligible.
I believe they caught him going for the face, which he did. However, the force used was negligible, because he actually didn't make contact. So the law seems contradictory.