Masashi Kishimoto said this quote
“ A smile is the best way to get oneself out of a tight spot, even if it is a fake one. Surprisingly enough, everyone takes it at face value. I read that in a book.If you keep staring at me, I'll hit you.I only became part of your team recently when I replaced Sasuke, so I don't know everything that's going on. I don't really understand people either. But even I can tell that Naruto really loves you. Naruto's been shouldering that promise for a long time...I think he means to shoulder it for the rest of his life. I don't know what you said to him, but it's just like what's been done to me - it feels like a curse. Sasuke causes Naruto pain, but I think you do too.Sasuke is only helping spread his darkness across the world. Letting him live will only sow the seeds of another war. He's just another criminal now. Sasuke lost all hope of coming back when his group, Akatsuki, attacked our village. Your fellow Konoha shinobi would never accept him now. Sakura's not stupid, either. She understands the position he's put us all in. That's why she came out here, to tell you herself. ”