The thing with Sakura and Naruto is that Kishi or more like Yahagi (That's his name, right? I ask because I remember a couple of times I wrote Yahanagi in the past lol ) really wanted to show that one should always save their friends no matter how far they're gone.
Problem was this has gotten to the extreme and beyond it, to the point of insanity. He should've had a limit to it, which unfortunately was never implemented.
It's gotten to the point in which Sasuke can do anything to anyone, and Naruto and Sakura would not only be perfectly fine with it, but also defend him. Especially true with Naruto.

Which I've told you - time and time again - is dangerous! There will never be consensus, son, among those you have helped to ascend. They will all differ in their views of what it means to be free. The peace you so desperately seek does not exist.
These men are united now by a common cause. But when this battle is finished they will fall to fighting amongst themselves about how best to ensure control. In time it will lead to war. You will see.