why was the great houyhnhms deeply upset and baffle when gulliver at request the revolution under the prince of orange?

The Author at his Master's Commands informs him of the State of England. The Causes of War among the Princes of Europe. The Author begins to explain the English Constitution."

Over the next two years, Gulliver explains much about the English government and political systems. Gulliver tries to explain war and the reasons why humans kill each other. His master says that Yahoos in England are worse than Yahoos because they use their reason to gain power but use it badly.