Ignorance is Strength

One classic characteristic of unhinged conspiracy theory is that there is no data point -- no matter of objective fact -- that does not support your theory. If you're convinced that the Zionists control everything, then a Jewish chairman of Goldman Sachs is evidence supporting your theory. And a non-Jewish chairman of Goldman Sachs also proves your theory, because those darned Jews are just crafty enough to do their dirty work through such a shill.

Similarly, true believers in Anthropogenic Global Warming Climate Change will patiently explain to the skeptical that normal weather isn't contrary evidence, because weather isn't climate, you ninnys! Everybody knows THAT! But extreme weather, on the other hand, is proof positive.