There's a further complicating factor: often when this happens, both modern Blues and Greens won't exactly correspond to historical Blues and Greens even though both are using the same terms. Worse, when the entire region of acceptable social policy has changed, sometimes an extreme Green or Blue today might be what was seen as someone of the other type decades ago.
Yes, the first wave of a movement may have many divergent descendents, which end up on different sides of a current political dispute. And the direct-est descendent might be on the opposite side of the political divide from what we would predict the first-wave proponents would adopt. But for that to happen, there needs to be significant passage of time.
By contrast, if the third wave of a movement cannot point to an immediately prior second wave that actually believed the position criticized (and which the third wave has already rejected), then Villiam_Bu...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.