[Pretzel]

I would recommend detaching yourself from the situation and trying to think it through from the other person's perspective. It's easier to handle something if you can figure out the motivation behind it.

If they're cheering for the other alliance's toppling stacks because they're on the edge of moving on in elimination rounds and that could push them over it could be as simple as reminding your team of tactful behavior in situations like that. If it's something born out of malice, I'm not sure what the appropriate response would be.

I know a negative experience with a mentor on another team left me with a dislike for that team until I talked with other team members about it and actually isolated the cause for my own prejudice. The incident was adrenaline-fueled and emotionally charged, which left me with fuzzy memories of it until I specifically went back to figure out what the reasoning behind it was. After doing so I attended two regional events with that team this year and had a great time playing both with and against them without any hard feelings.