What crime did the Lilliputians consider to be greater than theft?

In the fascinating world of Gulliver's Travels, we are introduced to various eccentric societies and their unique laws. Among these, the Lilliputians stand out for their meticulous and intricate system of justice. My question is, amidst their rigorous codes and strict punishments, what specific crime did they deem to be even more heinous than the universally condemned act of theft? Was it a violation of their intricate social hierarchy? A betrayal of trust so profound it shook the very foundations of their society? Or perhaps, a transgression that threatened the very existence of their tiny kingdom? Unraveling this mystery sheds light on the depth and complexity of their societal values and the intricate web of beliefs that underpin their unique civilization.