Why does behavior at funeral make Hamlet so angry?

The behavior at the funeral makes Hamlet so angry because he sees it as hypocritical and disrespectful to his father. He believes that the people attending the funeral are only putting on a show of grief and that they do not truly care about his father's death. He is also angered by the fact that his mother has remarried so quickly and that his uncle, Claudius, has taken the throne. He feels that these actions are a betrayal of his father's memory and that they show that his family does not respect him or his father.