It's very simple. As noted in a previous post (or ten), the problem is the sample size. Pick the right window to cherry pick your data and you can support any hypothesis you choose.
Just remember: Around 900 A.D. the Vikings established an agrarian society on Greenland. That society lasted about 500 years (that's longer than white Europeans have inhabited North America) ... until approximately 1400 A.D. at which time it became too cold for the agrarian society to continue, so they abandoned Greenland.
It ain't warm enough yet to start farming Greenland, so IMHO we're still just in a cyclical swing. When it gets too HOT to farm Greenland, maybe then we can start talking about global warming.