itachi is partially responsible for the apocalyptic catastrophic world war we are in right now.
so no why thank him for contributing to this disaster? helping seal up the bijuus into gedo mazo? refusing to properly give konoha intel on akatsuki to the point where kabuto was more helpful than he was? refusing to kill sasuke before sasuke went rogue and invaded the summit/took gyuki's chakra? obito would have refused to revive juubi if it werent for that one tentacle's worth of gyuki chakra. so whos fault is it REALLY we are in this situation?
itachi didnt stop shit. kabuto? he needed help and sauske could have killed him on his damn own.
nagato? again naruto is in no danger since if it werent for itachis presence, that situation couldnt have come to pass. without itachi holding konoha back this whole time, they would have sent in a competant spy and know long in advance exactly how to kill nagato or capture him if need be.
Sasuke brought back Orochimaru and asked him to resurrect the 4 Kages. If it wasn't for these two things happening, everyone would have been solo'd along time ago.
again sasuke's presence sped things up regarding obitos plans. he killed off half the akatsuki prompting obito to reveal himself ahead of schedule when no one was truly ready for the war. he took a part of bee's chakra prompting obito to believe he has enough material to revive juubi.
and by your logic, obito saved the world. he could have killed oro a long time ago and didnt. this led to orochimaru reviving the kages. or how about you go back even further and thank tobirama for creating the fukin jutsu. which also KILLED HALF THE WORLD.
or go back even further and thank sasukes distant descenent.
sasuke and itachi havent saved the world and stopped the war. the shinobi alliance has. its a team effort.
ust goes to show that if it weren't for Sasuke everyone would be dead
everyone is dead, with him or without him. he cant win a war alone. the alliance prevented their own fukin deaths
o one is/was a match for Madara and Obito except the dead kages. You fail to remember the help that Naruto received from Edo Minato and the rest. It took an entire army plus the dead kage plus talk no jutsu to match obito's strength. Also the other alliance Kage would not be healed if it wasn't for Orochimaru. So Sasuke pretty much saved all of these fools.
sasuke helped put the world in this situation. and you fail to remember sasuke almost got solo'd by kabuto. you said it yourself, if it wasnt for orochimaru. orochimaru saved them. sasuke hasnt really done anything himself to sway the war besides reviving oro who could just as easily have told sasuke to go eat a dik and fuked off somewhere else.