How does paragraph 7 contribute to the development of ideas in the article?

Article- Herd behavior

Paragraph 7
Some historians believe that Adolf Hitler purposefully took advantage of herd behavior psychology by planting a significant number of undercover German officers in the crowds at his speeches. These officers would enthusiastically cheer for Hitler, and the rest of the crowd followed suit, making it seem as if the entire crowd supported Hitler. These speeches would then be broadcast to a larger public audience, magnifying the effect.