That's a little overstated. If you go by national exit polls, both Stein voters and Johnson voters "would have voted" for Clinton over Trump (in a two-person election) about 25-15. The rest wouldn't have.
If that margin is applied to each state (which isn't quite right but whatever), that's roughly enough to flip Michigan but probably not any other states.
So, true that you can't pin the blame on Stein, but she did have an effect, partly measured by the vote, and partly unmeasurable in terms of enthusiasm dampening, etc.
Same sort of thing with Nader - you can't quite draw a mathematical line that he flipped Florida, but all his Gush/Bore stuff - who knows what affect that had in terms of people not voting.
If that margin is applied to each state (which isn't quite right but whatever), that's roughly enough to flip Michigan but probably not any other states.
So, true that you can't pin the blame on Stein, but she did have an effect, partly measured by the vote, and partly unmeasurable in terms of enthusiasm dampening, etc.
Same sort of thing with Nader - you can't quite draw a mathematical line that he flipped Florida, but all his Gush/Bore stuff - who knows what affect that had in terms of people not voting.