Let me see if I can explain this using a different classic story example. Let's consider Anakin Skywalker. Anakin loved his mother and Padme above all. At one point in the story, Padme questions Anakin asking if Jedi were allowed to love. Anakin, knowing full well that Padme is correct, responds that Jedi must have compassion for all things so in a way they are encouraged to love, however he is using this to justify a selfish need. He knows that there is a difference between possessive love and compassion, otherwise he wouldn't hide this from the Jedi. This love becomes twisted and Anakin's visions of Padme dying become his quest for power to prevent this from occurring. Eventually the visions become self fufilling as Padme dies from a labored child birth after being nearly killed by an enraged Anakin. Now an argument could be made that if the Jedi had not had this rule then Anakin would not have had to hide his love and all would have been fine but it is a catch 22. Anakin's possessive love cannot be the way of a Jedi who must avoid possessiveness and attachments so that they can have universal compassion.
Now in the end, Darth Vader's love for Luke overcomes his quest for power but look at the toll it took. You are not far off the mark though as folks are applying duahlistic thoughts to a non-duahlistic theme. The answer is that they (elder and younger) are both correct and both wrong and therein lies the gyakusetsu (paradox).
Sasuke's love is very possessive and attached to his brother, family, and clan. He does not exhibit compassion but feels (and possibly rightly so depending on your personal perspective), that he is justified. The Ninja system failed to have compassion towards his family and clan and that validates his actions to take such a system down.
Personally, I think that Sasuke will catch on to the fact that there is manipulation occurring behind the scenes and that like Darth Vader he will overcome this through his love of something else to overcome the true antagonist,,,,Halliburton.......
