This has got to be one of the most bogus analyses on the subject I have ever seen. One can argue about reliability of data from the past centuries, or the past millenia, or recent geologic history, but the data from the last decade is unassailable. So why is the author not including the data from 1998?
I'll answer that question. 1998 had the highest temperature in the last 80 years. If it were included, the graph would incontrovertibly show global cooling! All of the trend lines would point down.