In the following episodes, how are they ironic?

A) For over thirty years, the men in each family have been committed to killing off the men in the opposing family. No one remembers why the feud started, but several men have been killed each year. 

B) When the Grangerford's attend church, all the men carry guns with them, and ironically listen to preaching about brotherly love. 

C) The elopement reingnites the feud in full force. Ironically, the two lovers are the only ones that survive.