The two graphs below show what temperatures used to look like in the US and Iceland, before they were tampered with at GISS. The 1930s was the hottest decade, and temperatures were declining. This disproved Hansen’s theories, so he had to get rid of the graphs.
The blink comparators below show how Hansen got rid of those unwanted cooling trends.
Our lukewarm friends say that GISS data is all good, which means that the Earth is both warming and cooling at the same time.