yes, there is a lot of debate about this, and yes statistics can be skewed in whatever direction you want in climate changes because there are so many factors involved.
Even the biggest and fastest computers ever made can't get climate 100% right, it is quite simply........beyond our current knowledge.
A climate expert is the same as a women expert, knows just enough to be wrong most of the time, lol.
Best guess at this time is that the northern hemisphere is warming, and that seems to be a normal if not predictable cycle.
The Sahara desert, second largest land desert, antarctic is first, was created by climate change, 12,000 years ago it was a grassland with lakes and rivers where humans built towns, 5,000 years ago it is what we see today, so it wasn't an overnight change but it did change.
This wasn't global warming just a shift in climate, best guess on this one is the earths axis tilt, which varies from 22deg to 24deg in 21,000 years, we are at 23.4deg now and heading towards 22deg, but it is just a best guess from the "experts".
Tilt movement is real, no guessing on that, climate changes from the change in tilt is the guessing part.
And the earth's yearly wobble in its average tilt is what gives us summer and winter in the first place, so the main tilt of 22-24deg can be important.