How could anyone? Let’s work backward from you question:
Starting with the Daily Caller headline:
“Flashback 1971: Scientists Predict Burning Coal Will Cause The Next Ice Age”
The Daily Caller Story references the Real Climate story headlined
“45 Years Since Top Scientists Warned That Fossil Fuels Would Cause A New Ice Age
Posted on April 2, 2015”
https://stevengoddard.wordpress.com/2015/04/02/45-years-since-top-scientists-warned-that-fossil-fuels-would-cause-a-new-ice-age/
Real Climate cites as evidence a 1971 newspaper article “U. S. Scientist See New Ice Age Coming”
The newspaper article was based on one paper by two scientists, “Atmospheric Carbon Dioxide and Aerosols: Effects of Large Increases on Global Climate” (Rasooll and Schneider 1971) which said if you hold everything else constant a 4-fold increase in aerosols could cause substantial cooling.
http://www.sciencemag.org/content/173/3992/138
Meanwhile, in 1976, Hansen co-authored a paper, “Greenhouse Effects due to Man-Made Perturbations of Trace Gases”
http://www.sciencemag.org/content/194/4266/685
There is no way to logically or honestly follow that progression to a conclusion that "scientists were scaring us about using coal and this was going to cause an Ice Age?"
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OM --
>>Edit@Gary F: Perhaps you missed these other articles: <<
It is true that I get zero information about science from news stories - particularly snippets from article - and I certainly do not read the same story a dozen times and conclude that means there is 12 times more evidence of something. On the other hand, if I read 12 research studies based on independent lines of evidence from physics, chemistry, geology, and biology then I do weight the information more -- because consensus of evidence is the basis of all scientific knowledge. In any case, Goddard's collection of nonscientific evidence - even when not repetition - does not always say what he claims. Apparently, Goddard considers and past reference to cool weather events is the same thing as predicting an Ice Age. And, I doubt many people were really scared by forecasts of Ice Ages 10,000 years and more in the future.