I don't know what that site is but they don't cite any references. Next time you want to post "facts" do so from a reputable source if you want your opinion to be taken seriously.
This is the data from the Australian Institute of Criminology:
http://www.aic.gov.au/publications/current series/facts/1-20/2012/1_recorded.html
the 12 month period directly after 1997 saw a 10% drop in homicides instead of a 3.2% increase as the blog you cited claims
since 1997 to 2011 there has been a 33% drop in homicides.
LOL... thats a load of BS right there.