The Asuras are a major aggressor in the Dimension War.
Asuras value ambition and individuality above all other things. Much of their society is built around a strict hierarchy, where "stronger souls" are given full rein over lesser beings. Disobedience of a superior is considered extremely immoral, but only if your higher up decides that it is. Killing the superior legally erases the crime, but then you are guilty of assassination instead of whatever you did wrong in the first place. This can lead to long chains of dead officials until everyone who can still be considered a higher up decides not to take legal action against you.