Okay, so Ragnarok is arguing that the malice would take-over and control the kitsune, turning them into some sort of malicious entity (not entirely sure how that differs from a Yako-Kitsune). Kevak is arguing that the malice would overload the kitsune and force them to vent all of it with presumably large amounts of collateral damage.
And somewhere along the way, we got into surgical burger implantation.
Using the food metaphor, not a bad analogy.
Also, even if he tried to vent it quickly, at that point it wouldn't matter. The hateorgy thus spawned would then proceed to fuel it enough to regenerate itself as fast as he used it.
Also, IIRC Yako-Kitsune are mostly trickster assholes.
This would be straight-up murderous.
So, what would happen, if hypothetically there was a being capable of consuming Tor's Malice WITHOUT going insane? I know it's probably impossible short of being the principal, but I'm curious.
Not impossible. There's a power that is built specifically to do that.
It's called Willpower. Its main power is literally to keep Malice contained and occasionally let it out in EXTREMELY controlled bursts to turn the person using it into an eldrich abomination for a short period of time at the cost of their sanity and a chance of losing control and going completely insane.
The few people that could use it (all humans, by the way) were mostly killed off because, you know.
Occasionally go berserk and level entire villages.
Tends to make problems.
That's basically Plutarch. Except it also enables it to try and murder everyone without the risk of it depleting enough anger to make it dissipate. So yeah, the person that can is a raging asshole.
That's not not being insane, that's being a fucking awesome actor and having a comparatively little amount of Malice.