He wasn't thinking, that's the point. ... Being rejected by his newest 'adopted' family - Claire and Aaron, was just too much for his psyche to take after everything else in his past. He lost it. I think he can get better though. Lost is all about the redemption, yo.
Yes, his psychic snapparoo was definitely prompted by feeling helpless to keep his "family" safe and to be part of that family unit. My heart broke, though, when he took Aaron because it was just so shockinly extreme. No, I didn't think for one second that he'd drown the baby. Still, his extreme reaction might've felt more "warranted" to me if Claire had cut off ALL contact with Aaron and everyone else had rejected him too--lots of jeering and rude words and such.
Anyway, I really, really wish he had kept only ONE statue as a reminder of his weakness. Having all those others around really sunk him, big time. That just didn't make sense. So he needed one to carry around and just hide six others just to stare at every so often?? That seems like something you'd do only if you -were- strung out on heroine. Oh, and another thing: why, oh why did Locke KEEP those statues? How freakin' stupid. Why not destroy them? aaaugh! That frustrates me.
Oh, and Jack better not fall for that stupid Anna Lucia chick. blech. I really don't like her character. I'd hoped to like/understand her better when the story backtracked to her first day on the island, but seeing more of her story just made me roll my eyes. *sigh*
On the more happy side, I did appreciate the Hurly/Libby side story. That was cool.
But I worry so much for poor Charlie now...