Riots in the streets now is preferable to the current path where our great grandchildren all die from heat stroke.
But I agree with your point, the political calculus doesn't make sense. If politicians are afraid of riots in the streets then we need to give them something worse to fear.
Ecoterrorism or extinction seem to be the only options available.
In an ideal world, Hitchen's Razor would be applied whenever a politician speaks and whenever an advertisement plays.
Unfortunately for us, human psychology makes us all vulnerable.