But your whole premise is false. From the OP: "And to upend the inevitable backlash that news will receive (spoiler alert), using all the raw data without performing any analysis would actually produce the appearance of more warming since the start of records in the late 1800s."
It is due to the adjustments of the ocean temperature data. The SST data has been adjusted upward. Due to the adjustments the global temperature is estimated to be warmer in the past than the raw data show (http://variable-variability.blogspot.com.au/2015/02/homogeni...)
