I'd think it was a survivor type if the 'kill everyone else' thing wasn't there.

I guess it is possible by 'kill everyone else' it is implied that the person wants them all to be lynched/nightkilled, but the phrasing of that suggests to me at least that they have some direct hand in the killing.

Of course, hopefully that won't happen.

Intrigued about the note though. That seems suggestive of... something.