The reason the rules committee (made up of coaches and not officials BTW) has increased the penalty for targeting is because the game we love is under attack. Concussions are a huge concern and past attempts to get players to remove the head from the game have not worked. If they aren't able to get players to change technique, football could eventually go the way of boxing. Youth leagues are starting to see major reductions in participation already. The popularity of the game will sustain it for awhile, but if behaviors aren't changed it could be in significant jeopardy. None of us want to see that. You have to accept the possibility of some cracked eggs when addressing this.
If anyone has any other ideas to get players to tackle properly I'd love to hear them.
Also, the rule is there to protect the tackler as much as it is the opponent. They are just as susceptible to head injuries as the guy receiving the hit.