Originally Posted by Relentless

They left out a lot of the subtext. All the traditional reasons why it was not only treacherous but also a wrongful killing in many other ways. Thousands of years of tradition that no one should shed blood at a wedding, an absolute prohibition on harming anyone once they have eaten bread and salt in your castle. All the kinds of things that let warring people send delegations to make peace. Fray broke all of them, ruined his family name beyond this war and made it so no Fray will ever be trusted by anyone, no matter which side they are on now. Also the fact Rob was losing support as with Karstark, and now has been martyred by Fray was left much more vague than in the books.

The stuff with Osha and Bran is better on television than it was in the books, but the red wedding had so much more depth and power in the books than the television show could communicate.