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what u mean itachi isnt forcng anything, if anything itachi has even kabuto all the time in wrold to figure a way around this jutsu. And before u say anything, yes this jutsu can be countered just like any other tech. Izanagi was countered by keeping an eye on the timing of when the jutsu begins and ends. I'd imagaine izanami has simular ways to counter it. This jutsu wont last forever. Kabuto could just tank it so to speak.
Its still up to kabuto, he can just kill himself if he wants. I'm actually hoping this happens has we dont actually want edo tensei to end right now.
Itachi is making Kabuto release the technique with Izanami. A genjutsu that Kabuto fell into regardless of his immunity. He has to choose to release Edo Tensei or go through the loop over and over again.
Tobi would control Kabuto and form hand signs to release the technique but that won't work . Why? Because Tobi would need to make eye contact in order to catch Kabuto in a genjutsu. Kabuto is immune to visual genjutsu.
^ This is why Kabuto told Tobi how to release the technique because even if Tobi knew how to release it, he wouldn't be able to simply because Kabuto can't be controlled by visual genjutsu. He was certain that Itachi wouldn't be able to catch him in a genjutsu but guess what happened? Izanami.
I hope you see the difference.
And no one is saying it can't be countered. The user of Izanami himself said that every technique has a weakness.