Moral ambiguity exists at every level here, which is the difference between entertainment and art.
The eco-terrorists start off portrayed as not nice people, which again is far more realistic than Hollywood normally does.
In the middle it does introduce superstrong zombies and magic rearrangement of matter which is rather a shame.
And ends with the good guy heroic, and the ecofascists destroying civilisation (and presumably 90% of the human race).
A good try and evidence that genuine SF films can be made (rather than ever bigger special effects), and of the difficulty Hollywood has in doing so.