I'd also consider the possibility that the generations-old and well-connected fossil fuel lobby also had a hand in it. In fact, I'd wager a much larger effect than Ms Fonda and co.
It's like expecting C&H would come around and denounce anyone who said, "ice-cream is great, I love sweets, let's all celebrate with sweets". Sure, if they were ethical, they'd mention how sugar is bad for human health and undermine their company.