"Through me you go to the grief wracked city; Through me you go to everlasting pain; Through me you go a pass among lost souls. Justice inspired my exalted Creator: I am a creature of the Holiest Power, of Wisdom in the Highest and of Primal Love. Nothing till I was made was made, only eternal beings. And I endure eternally. Abandon all hope - Ye Who Enter Here"
As far as it goes, i see nothing wrong with what kiwi did. If I was put in a position where I had to pick between the two of them, I would have gotten rid of James as well. Keeping kiwi keeps the group stronger.
I am not sold on any of this. My theory is he is using the red potion to cover up an item, unstoppable item, or unstoppable kill he earned for completing his red room task.