The paragraph was not included in the question. But then, when the author used the extreme language, "Unthinkable," to describe the feeling of the people about the ad, it meant that they would have totally abhorred the content of the ad.
An ad is meant to make people purchase a product. If the feeling of the audience towards the ad is unthinkable, it implies a total rejection of the ad's content.
That means that their perception of things was not in tandem with the ad's content.
Therefore, the use of the word unthinkable means total rejection.
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https://brainly.com/question/1670120
