first, I agree with the guy who put it as a separation of sacrifice and "who did more for their village".
second, everyone is bringing up irrevelant topic, sasuke wants to kill the village? minato basically saved itachi? none of that matters, what's the worse thing that could happen to the village? it gets destroyed. did not both of them prevent this? and yes itachi did it on more than one occasion, had itachi not killed his clan, they would have attacked, and please people, it would have been way more than a few konoha shinobi getting killed, weak in numbers other countries would have invaded, tobi and itachi understood this, it's also common sense U_U
then he joined the akatsui and stopped them from attacking it, by the time they were ready, so was naruto and was able to give his talk-no jutsu to nagato.