He tried to kill Makoto for the exact reasons you say you hate him: he was indirectly responsible for all the shit that went down. With the Remnants being one of the greatest factors in it, he believed that Makoto was helping them, and thus wanted to kill him to fix it. Also, had he not gone to the power, not a single person would have known what to do. Yeah, no one died during that sleep cycle, but given the fact that the mastermind doesn't seem to be with them, they'd be running around like headless chickens trying to figure out how to get out.