What is the line of doctrine over which the Blefuscudians and Lilliputians differ?

The people of Lilliput and Blefuscu are unable to get along because years ago, after an emperor's son was injured trying to break his egg on the smaller end (the traditional way of egg breaking), he decreed that no one may break the smaller end of his egg. This caused a great uproar among many of the Lilliputians and led to six rebellions and thousands of deaths. Eventually the Big-Endians were exiled and went to Blefuscu, where they gained favor and convinced the government to go to war against Lilliput.