redewenur asks:
"have I been misled by umpteen climatologists?"

Of course not.

Were it true that less radiation gets in then, by definition, things would cool off. Glaciers would not melt. Polar icefields would not get smaller, plant growing seasons would not enlarge, plants, animals, etc. would not be moving to locations higher and higher up hills, etc.

Politics never trumps reality.

Just as the odds of getting a full-house never trumps the fact that what you have in your hand is a pair of deuces.

DA Morgan