[Hunter]

Originally Posted by Ero-Senn1n

There's a big difference in being caught by fire or deliberately hitting the fire.

That's completely irrelevant to the point being made.
To be immune to something is an absolute, to be able to dodge or avoid something is not. Kabuto, or the Raikage in your previous example, weren't immune to their attacks, they can avoid their effects only in a particular set of circumstances. If those parameters change then all bets are off and they become just as susceptible as anyone else precisely because they aren't immune to the attacks in question.
The Raikage's speed allowed him to bypass Sasuke's gaze which allowed him to dodge Amaterasu, but since he was however not immune to those flames, Sasuke's Kagutsuchi made in turn this vaunted speed meaningless.
Similarly Kabuto's eyes cap + Sage-sensing ability allow him to bypass eye contact which allow him to avoid sight-Genjutsu but since he's not immune to Genjutsu he's still susceptible to fall prey to mind control if the Uchiha brothers pull the rug out from under him.

At least now that we know how insanely strong Kabuto has become it is not a plot hole any more that Tobi didn't try to kill him and more importantly that he was hiding EMS-Sasuke from Kabuto while back at the kage summit he didn't really care about the risk of Sasuke fighting 5 kage at the same time.

That never was a plothole, Tobi could take on Kabuto but that would have taken a terrible token on his own forces. There was nothing to gain from a conflict between them at the time. It's the same reason why Kabuto gave up the secret of Edo-Tensei to Tobi, they both know that eventually one of them will have to kill the other but it's too dangerous and counter-productive just yet.

Sure there is the risk because Kabuto has all those Edo Tensei, but if himself were weak then someone who can teleport himself and even Sasuke could easily bypass the zombies defending Kabuto and attack him directly. On the other hand Kabuto escaping from the Turtle-island seems more like a plot hole, because he could have summoned there a dozen edo-tensei and then himself go into sage mode and easily capture the 8 and 9 tails. Kabuto escaping from that island was one reason why i couldn't believe that he became so strong.

And then what? With the 8 and 9 tails in his possession before the war started he would instantly become a target for Tobi and the Alliance before they weakened each others. As it is he's screwing them both until their respective fighting forces are more easily manageable.