Where to start...
Crime statistics are about as slippery as a kettle of fish, soaked in banana oil. If you note, on the page linked in the original post, there's also a link to the FBI's Uniform Crime Reports. The UCR is made up of statistics on crimes reported to police; many of the reports on the BJS page are victimization reports; they come from information reported by victims in surveys or other ways. You'll find the two don't tally exactly... For example, no victimization survey ever includes murder. (For some reason, murder victims just don't seem to answer many surveys!)
But surveys and statistical reports only paint part of the total "crime picture." Just as important -- or maybe even more important -- is how safe you feel in your home, in your job, and as you go about your daily business. No matter how low the crime numbers, if you don't feel safe, if you feel like there're crime problems, then there are. You'll live like that; you'll stay inside, you'll avoid businesses and locations... You'll live as if you're in a crime war zone.
Another important thing to consider is that there have been some major demographic and economic factors in the US over the last several years have contributed to downward trends in crime. Those factors are changing. The main population of offenders (males, 18 to 25 or so) is increasing. The economy is worsening. Times are getting tighter. We've got kids coming back from Iraq, Afghanistan, and other combat zones with more problems and more willingness to be violent; we're doing our best to help them before they get out -- but that doesn't mean they're all getting the help they need. Please note, I'm not suggesting every Middle East vet is a ticking time bomb a la the stereotypical Vietnam-era vet, merely noting that there will be those who, whether from PTSD or some other mental illness, or simple human greed and evilness, who will bring their combat experience to a life of crime.
We also have vastly increased awareness of crime, not only in our little neighborhood, but across the state and even the nation. We even hear about criminal activity from other parts of the world! More crime information is released, in more ways, than in the past, about even pretty minor offenses -- and we here about it. Neighborhood list serves, web groups, and activist groups are quick to point to every offense and circulate them... heightening the perception of crime.
So... what's this amount to? I don't know. I just go out, and do my job. I catch the bad guys I can, educate the public when I have an opportunity, and won't surrender my lifestyle to fears of crime. And I encourage everyone to do the same.