I think that's fair. I'd still call purple desirable, but not doable. Those two colors aren't what they were, and I like your word choice: poison. When the State's new right is running the former head of the RNC, Marc Racicot, out on a rail, and the new left is, well, just kinda absent or sitting somewhere on a park bench in Missoula playing a banjo, then it's hard to imagine them working together to get anything done.
Montanans need to stop making transplants as the whole a problem, and figure out ways to introduce them to our culture (and not the yellowstone fantasy) and not alienate them. They show up beating the drum of their national politics, and I think there's ways to introduce them to what we all hold dear without attributing it to a political stance. I've been giving this some serious thought of late after this article: the majority of Montanans are now not born in Montana.
https://missoulacurrent.com/montanans-born-state/ Our governor and one of our representatives are transplants. This isn't changing, but if we want to hold on to what we, born and raised Montanans, care about, then we need to educate. Pipe dreams abound...