I said it before Makoto's actions is basically related to and probably one of the reasons that lead to about half of the deaths in this game.
Chihiro? Tells him to go meet with Mondo to become stronger.
Ishimaru? Breaks the rules to take him to see Alter Ego
Sakura? Doesn't tell everybody what he saw
Kirigiri's possible? Tells everybody her lie
I guess Maizono? Too soft hearted and switches room with her
MAKOTO RUINS EVERYTHING.
See, I can't tell if you're joking or not, but it sounds like you're implying that Makoto's inadvertent actions led to a bunch of deaths, when that's not really the case. Disregarding the fact that the mastermind is ultimately behind everyone's death, you're way off base.
Chihiro: You made 2 faulty assumptions here
1) You're assuming that all of the social links are canon to the main story. I'm sure they "could have happened" but I doubt they had an effect on the main story (otherwise Makoto would have known about Chihiro's alter ego program in advance, and his reaction to each individual death would be a lot more pronounced, etc)
2) Makoto didn't outright tell Chihiro to go see Mondo. Chihiro assumed that Makoto was a strong person (he wasn't) and Makoto suggested that Chihiro he should train with someone like Mondo instead. You're assuming that Makoto's suggestion had an effect on Chihiro's decision to be contact Mondo,
but it was a foregone conclusion. Chihiro would have gone to see Mondo regardless.
Ishimaru: Taka made the decision to see Makoo. Makoto was apprehensive about it, but decided to let him see anyway because he's a nice guy. It's not Makoto's fault that he completely overreacted and turned into... Kiyondo.
And it's especially not his fault that Kiyondo was stupid enough to believe in Celeste's letter in the first place!
Sakura: It wouldn't have made a difference. Junko was going to reveal her identity as a double agent anyway and you're forgetting that Sakura had resolved to kill herself.
Kyoko: Sure, but only because Junko had completely rigged the murder trial. But wait a minute, it's not canon so you don't really have a leg to stand on!
Sayaka: So you're blaming Makoto for a would be murderer's death, because he inadvertently helped her out...? How do you figure that? If he "didn't" switch rooms with her, then Sayaka would have tried to murder someone else in a different fashion. Or hell, she might have gotten desperate enough to kill Makoto himself!