This is correct. A position of revolutionary leadership requires personal ethical fortitude and behavior in compliance with developed political principals. It is pre requisite for the job and if people do not understand and abide, then they are unsuitable.

Also, how is being removed from authority or even the party contrary to restorative justice?

They are not handing him over to police with all the evidence and acting as state witness. Nobody is filing a personal lawsuit. Nor are they taking retribution into their own hands by delivering a beating, incarcerating him themselves, forcing him to pay monetary damages, or knocking him off. He isn't even being socially exiled or shunned. At least from what I have seen on hexbear, no suggestions for any of those.

In fact all involved have had opportunity for communication and negotiations. A generous dialogue of constructive criticism have been provided to perpetrator and his allies, which they can draw upon in their (potential) efforts to improve themselves and each other.

Restorative justice isn't only saying "well he's probably sorry, let's move on", but requires addressing dynamics which created the harm. Clearly, this perpetrator and his supporters are not qualified for their positions, and have brought disgrace to the party. There have been errors made in structure, power relationships and accountability and now is the time to attempt correction.

In regards to the restoration of the individual perpetrator, he will now have more time to engage in such work. He seems to have resources and relationships available to him. Part of that will be learning to live with humility as a regular person who can't exert excess political/interpersonal pressure to satisfy his desires. He can learn now that holding a political position is not his inherent right, but a job undertaken in service of the working class, that comes with obligations. He can decide if he is still interested in contributing to revolutionary work when he doesn't get the same personal rewards as before. And if he wants, he will be able to find a way to do this, while recusing himself from roles that tempt his weaknesses of character.

There is no obligation on any group to maintain a member, much less leader, while they engage in such growth.