Fury at anarchist convention threat 'These hard-core groups are looking to take us on. They have increased their level of violence.' - Police Commissioner Raymond Kelly By PATRICE O'SHAUGHNESSY DAILY NEWS STAFF WRITER The NYPD aims to keep things well in hand during the convention. "Where is the legitimate protest in trying to endanger the public?" an angry Police Commissioner Raymond Kelly told The News. Fringe elements are hoping to spark major disruptions at the Republican National Convention with a series of sneaky tricks - including fooling bomb-sniffing dogs on trains bound for Penn Station, the Daily News has learned....