So much he gets right. Then Climate Change enters the picture. We doubt science because science teaches us to doubt. The default position of scientist IS doubt. You doubt your theories. You attempt to disprove them. If you fail to disprove them, you try to disprove them harder. It is the difference between failing to disprove and prove that is the difference between and scientist and a faker. It is small. It is huge.
I believe in Global Warming. In the recent past, my house was covered by 1000m of ice. Currently there is no ice, except for the occasional snow storm. It is definitely warmer now than it was in the recent past.
As to the 1.5F increase over the last century I can only suggest that the author and anyone else wishing to disprove their beliefs download the BEST data from Mueller's website. I recommend looking at each of the sets. It is a fascinating thing. This is the raw data they say they are compiling. I thought cool. I can plot all the data then. I carefully perused the file formats. The format description says it can handle data for any day of the year. Not one of the file sets you can download has the daily data. It is all monthly data. TAVE, TMIN, TMAX.
Averages scare me. They have fooled me too many times into believing things that aren't there. When experts tell me theirs are good and not subject to the vagaries of averages, I fret. The vagaries do not disappear because there is an expert watching over them. The vagaries are always there. If you are an expert in averages, you fret over the vagaries. Uncertainty in your data does not bread confidence though. You must be certain of your story and stick with it.
Uncertainty though is the essence of science.