I've written a very long hub about Global Warming, and I went into detail about the lack of data, among other things. Like you, I am very turned off by the Chicken Little aspect. That was one of my motivations for digging deeper. My academic background (analytical chemistry) was very helpful in sifting the wheat from the chaff.
I'm guessing that the red light on your crap detector is blinking. And that's a good thing. Let's consider the following scenario.
Suppose that man-made GW will cause The End Of The World As We Know It, unless all of humanity takes drastic measures. However Warmies are mainly setting the agenda in the EU countries and Australia.
In contrast, China, India, Japan, and other major countries are very skeptical about the GW propaganda. Without them, any attempt to decrease anthropogenic carbon emissions will not work.
Climate Fatigue is setting in almost everywhere. Warmies are well aware of the fact that they are on the losing side of history.
Suppose for the sake of argument, that the Warmist propaganda is true. How would political leaders respond? In order to postpone the TEOTWAWKI panic for as long as possible, they would say,
"There's nothing to see here folks; move along."
Under this assumption, Climate Alarmism does not make political sense. Now, let's look at some recent history. The rhetoric about WMD in Iraq was equally shrill, and it turned out to be a Big Lie.
In both cases, the real agendas are hidden in plain sight, and they have absolutely nothing to do with telling the truth, or with doing the right thing.