The 2nd pic make sense though. It's the kill million to save billion mentality, it would be the correct choice but for someone like Shriou he would still view you as a murderer taking the easy option.
Shirou is basically saying that his acknowledges the working logic behind the statement but due to his moral obligation he can't view it as a correct course of action. If he was a politician he would have just denied it altogether.
Silly anon. Kuroneko is best girl.
I'd argue she's a better tsundere as well.