Joshua -
If I may jump in here. Are you not getting a tad ahead of yourself with people who ‘self-describe’ as realist? You rarely describe yourself in any specific terms – which is fair enough – and I’m yet to hear anyone else call themselves a climate realist [except me, but I think I mean something different to you 
] so that would leave a sort of ‘empty set’ which doesn’t quite chime with there being self-described realists….
I accept that a big part of the ideological battleground is to take command of the terms used, but surely the first task is to get significant numbers of others on board with your usage?
Don’t forget that there are a few people heading in a seemingly opposite direction to you with ‘believer’ and ‘dissenter’ although to me that seems an eminently neutral taxonomy. Particularly because it leaves a lot of room for the genuinely unconvinced in the middle. And it doesn’t allow me to use ‘alarmist’ 