Precisely. The "climate change/global warming" hysteria is not about climate change, global warming or (certainly) science ... it's about power and control.
I'm afraid I don't entirely agree.
According to you, and the original author, those on the other side of the issue always and by definition have ulterior motives, money and/or power.
The problem is that a lot more people will do really bad things for a cause in which they truly believe than will do so for their personal benefit. See the number of people killed by true believers in the 20th century vs. those killed for money or solely to gain personal power. As Orwell pointed out, nobody in the world is more dangerous than an idealist with a machine gun.
Also, you can always find people to kill for money, but finding those willing to die for it is a lot tougher. See suicide bombers.
Though money/power/belief are generally intertwined, and I suspect those at the top of any ideological movement are less likely to be true believers.
Posted before finishing my thought.
It should be fairly obvious that one cannot effectively oppose the true believer with the same methods that work for those driven solely by what they see as personal advantage.