Quran (2:216) - "Fighting is prescribed for you, and ye dislike it. But it is possible that ye dislike a thing which is good for you, and that ye love a thing which is bad for you. But Allah knoweth, and ye know not." Not only does this verse establish that violence can be virtuous, but it also contradicts the myth that fighting is intended only in self-defense, since the audience was obviously not under attack at the time. From the Hadith, we know that this verse was narrated at a time that Muhammad was actually trying to motivate his people into raiding merchant caravans for loot.
Quran (4:104) - "And be not weak hearted in pursuit of the enemy; if you suffer pain, then surely they (too) suffer pain as you suffer pain..." Is pursuing an injured and retreating enemy really an act of self-defense?
Quran (8:12) - "(Remember) when your Lord inspired the angels... "I will cast terror into the hearts of those who disbelieve. Therefore strike off their heads and strike off every fingertip of them" No reasonable person would interpret this to mean a spiritual struggle, given that it both followed and preceded confrontations in which non-Muslims were killed by Muslims. The targets of violence are "those who disbelieve" - further defined in the next verse (13) as those who "defy and disobey Allah." Nothing is said about self-defense. In fact, the verses in sura 8 were narrated shortly after a battle provoked by Muhammad, who had been trying to attack a lightly-armed caravan to steal goods belonging to other people.
Quran (9:5) - "So when the sacred months have passed away, then slay the idolaters wherever you find them, and take them captive and besiege them and lie in wait for them in every ambush, then if they repent and keep up prayer and pay the poor-rate, leave their way free to them." According to this verse, the best way of staying safe from Muslim violence at the time of Muhammad was to convert to Islam: prayer (salat) and the poor tax (zakat) are among the religion's Five Pillars. The popular claim that the Quran only inspires violence within the context of self-defense is seriously challenged by this passage as well, since the Muslims to whom it was written were obviously not under attack. Had they been, then there would have been no waiting period (earlier verses make it a duty for Muslims to fight in self-defense, even during the sacred months). The historical context is Mecca after the idolaters were subjugated by Muhammad and posed no threat.
Yes, it's a shame it has to get this bad. But, sometimes it's just the kid. I have a friend with 4 kids born in only 6 years. Three turned out fantastic. That second born one was a terror, drugs, in and out of jail, pregnant, two kids by different daddies, he had to sue her to get custody of his grandchildren and is raising them himself. They've turned out fantastic. That one child though ... sometimes there are anomalies that defy explanation.