The spiders killing the Kurata for a reason was something I always suspected. Since I knew they were from Meteor city. First I thought that because they were from Meteor and seeing how the world treated them as garbage, that the rest of the world didn't have a moral foot to stand on when judging them.
A bit like in this quote of Malcolm X : "Well, for the White man to ask the Black man why he hates him is like the wolf asking the sheep, or the rapist asking the raped, "Do you hate me?""
That doesn't mean that what they did (or do) is just, I'm just saying that in their thinking they're always in the right, cause they're the initial victims.
–- Update From New Post Merge ---
@Thousand:
There's no such thing as an evil human.
All right now I understand your gripes with the arc. I couldn't understand your logic and where you got all your suppositions from.
So your problem is purely ideological.
Ok let me make things clear. The supposed themes (evil and such) you thought Togashi wanted to explore in this arc are just figments of your imagination, let me explain why:
First of all like all normal human beings he believes it normal and accepted that there are in fact evil human beings and that evil does exist. So in my opinion he didn't want to pass that message down our troat like you try to suggest.
Further the passing down of evil or good character to the reincarnated ant is just manga logic and has nothing to do with pseudo philosophical theory or whatever you think he might have done.
I for one was curious to see if Togashi (and I have said this earlier in this thread) was a pure materialist or believed in the soul/spirit and such; and was patiently waiting to see if he was gonna revive Kaito to the fullest or if he was gonna declare him dead.
-reviving a dead corpse=pure materialsim
-reincarnation in another organism= existence of the soul.
And if he in fact was a pure materialist, I wouldn't have agreed with his ideology, but I would still have enjoyed the arc for the story he made up in all its details and action and drama and etc…
So imo the themes weren't those you advance, but I think Togashi just wanted to tell a story and do some commentary on the world of today, with all the north koreas out there, the way we treat animals and ect... nothing to do with the philosophical issues you bring up.
Don't look at things through your TLC-goggles, Lion chan, try taking them off some times and look at them from different perspectives, especially the author's.