User blog comment:Halo1081/The War of Class E/@comment-25993554-20150615041008

Karma has known Nagisa for at least 3 years. Out of anyone in the cast, he'd be the last one to see him as some psychopath, a brute who only understands through violence, or simply an insufferable bully. Those are the first impressions people usually have about him, but given how observant Nagisa is, and the time they've spent together, Karma is sure Nagisa knows better than that.

And yet, that one look that set Karma off? We have seen it many times before. Like you mentioned, in his home situation, in the fights with Takaoka, and one I remembered, when those two Class D students (The glasses guy and the other one) were attacking him. After one disagreement, thats how Nagisa saw Karma. Just another threat that Nagisa had to defend himself from. He put him at that level, which is what I suspect made him lose it.

Both think the other is the best assassin. Karma believes that Nagisa is the best one of the whole class, and that, if he stops trying, there is no chance to kill Korosensei. Nagisa probably thinks that, since Karma is the strongest in the class, the chances to save him are next to 0 without his support.

Nagisa's skills are very fitting for hitmen, both in advantages and weaknesses. He's harmless looking, can surprise most opponents and find the right opening, and can frighten them with the threat of murdering them if needed.

If an oponent knows what he's going to do, and how dangerous he (potentially) can be, he won't be able to deal much damage, since they would be on guard.

Physically he's among the weakest students, and even the combat skills he does know aren't effective by his lack of strenght. So in a fight versus Karma, he's sure to lose. And, as we know, this is "war", not an assassination. Even if he does turn the situation into that, like with Takaoka, he can't actually kill anyone, and everyone knows that, so there is no point in scaring people with that.

Terasaka did make a painfully important point, since, if the best scientists on earth couldn't reverse what was done to Korosensei, it's downright naive to think middle schoolers with at best college level knowledge could save him. Nagisa is most likely aware of that, but he wants the class to try to look for a way to save him, which also means stopping the assassination attempts until there is no other choice.

One last thing, Korosensei wishes to be killed by Class E and no one else. While it's an incredibly harsh choice, thats his last wish. Like Nakamura said, the bond of Assassin and Target is important to her. It's what Korosensei educated them for, and they always knew that. Are they just gonna ignore Korosensei's own wishes and the whole reason why he's teaching them, just because they decided that he must live no matter what, regardless of his own desires? In case the "save" side forgot, Korosensei wishes to die. He never asked to be saved by anyone.