Take a look at the Department of Justice study [titled "Improving the Quality and Accuracy of Hate Crime Reporting, conducted by the Justice Research and Statistics Association released and coauthored by Northeastern University's Center for Criminal Justice Policy Research] -- which reveals that revealed was a reporting system for hate crime is deeply flawed, with statistics distorted by widespread failures to report the crimes and moreover, confusion about the differences between the absence of a report and the active reporting of zero hate crimes.
The DOJ study, which surveyed 2,657 law-enforcement agencies, reported a "major information gap" in the data: It estimated that some 37 percent of the agencies that did not submit reports nevertheless had at least one hate crime.
Worse yet, roughly 31 percent of the agencies that reported zero hate crimes did, in fact, have at least one; about 6,000 law-enforcement agencies (or one-third of the total of participants) likely dealt with at least one unreported bias crime. All told, the Southern Poverty Law Center estimates that the total number of hate crimes committed annually in America is closer to 50,000 than the 8,000 found in statistics.
... [T]he underreportage problem becomes acute with people who have reasons not to go to police, including gay men. This occurs on a massive scale in Latino and other immigrant communities, where even legal immigrants are reluctant to contact police out of fear of being deported.
Of all the factors that cause law-enforcement officers to fail to identify and investigate bias crimes, the most significant, the DOJ study's authors found, was the gap between the victims and the police. The less trust that exists between minorities and their local law enforcement, the greater the likelihood that hate crimes will go unresolved.
... Other studies have likewise observed that the most common cause of this cascade of crime is the failure of police to proactively bridge the gap between themselves and the victims. The JRSA's Joan Weiss, in earlier research, found that the reluctance of victims to report crimes was significantly higher for hate crimes than for other crimes. The DOJ study reiterates this point: "For a multitude of reasons, hate crime victims are a population that is leery of reporting crimes -- bias or otherwise -- to law enforcement agencies."
Most hate-crime victims are minorities in the communities where the crimes occur. In many cases, they have poor English skills and have difficulty asking for assistance; in others, they may simply be unaware that what has happened to them is a serious crime. This is particularly true for immigrants, who may be reluctant to even contact police because of their experience with law enforcement in their homelands, where corruption and indifference to such crimes are not uncommon. Likewise, hate-crime victims may be confused about or unaware of the bias motivation involved, interpreting a threat or assault as a random act when other evidence suggests it was not. At other times, they may be reluctant to tell police about the bias aspects of the acts against them, fearing the police won't believe them or that they simply won't do anything about it anyway. And in the case of gays and lesbians, many are reluctant to report the crimes out of fear they will be forced to reveal their own identities as homosexuals; many more fear (sometimes with good reason) that they will wind up being humiliated and victimized further by police.
Likewise, many minorities in certain communities -- blacks in the South or Hispanics in the Southwest, for example -- have long histories of built-up distrust of law enforcement in their communities, and may simply refuse to participate in an investigation without proactive efforts on the part of police to bridge that gap. Indeed, this level of involvement was almost unanimously the chief factor reported by advocacy groups when queried by the authors of the DOJ study about what most affected hate-crime victims' decision to call or cooperate with police.
Why we need a federal hate-crime law: Exhibit A in rural Pennsylvania | Crooks and Liars