>>715024151
I think he was genuinely certain, or had reached a breaking point. Dude had been spending years on this shit. Getting cornered probably drove him to the point of "if this doesn't work, then nothing will" and while he was desperately hoping it would work, we know what that got him.
Obviously, Kido was greedy, as were anybody else in on the conspiracy. Only one who didn't seem to care was Kuroiwa who just wanted an excuse to get away with dumping bodies and stirring shit up.