They might not having governing power, but these opposition parties, as well as NGOs like Greenpeace had a lot of propaganda power that they used for evil.
Even if this were true (and I strongly disagree with both the idea and the framing), it would make the governing parties complicit in the "evil". They could have used their power to fight against the "evil", but instead chose to participate in it to score political points.
Sounds pretty evil, huh?