why did everyone die ?

Rating: 10/10 (26 April 2006)

hey i seen this movie over 100 times thats how good this movie really is, but never actually figured out why every turned on each other in the end and killed each other (eg casino, bombing, joe pesci and his bro and a few more copped a few bullets) anyone care to explain a little more ?
thanx PS what is this you have to write 10 lines thing its taking me forever to fix it so if you know another way around this tell me also ay apart from tying nonsense to make up the 10 lines ? howcome i'm getting this error
"Your comment does not contain enough lines - the minimum length for comments is 10 lines of text. Please see the guidelines. Attempts to pad the comment with junk words can result in your account being blocked from future submissions.