https://www.npr.org/2023/01/01/ [login to see] /researchers-say-the-fbis-statistics-on-hate-crimes-across-the-country-are-flawed
The FBI recorded a drop in hate crimes in 2021, but the year's tally may not give a true account of hate crimes in the United States as thousands of law enforcement agencies were absent from the accounting.
The FBI annualized collection of data from law enforcement agencies saw 7,262 crimes motivated by race, religion, gender or other factors last year. That's a decrease from 8,263 incidents in 2020. But those numbers offer misleading conclusions as they are drawn from a pool of 3,255 fewer law enforcement agencies.
Only 11,883 agencies out of 18,812 city, state, municipal and tribal law enforcement agencies around the county sent data to the FBI, down from 15,138 in 2020.
The participation drop-off is due to a transition from a legacy crime reporting system that has existed in various forms since the 1920s to a more sophisticated reporting system that captures specific details of a crime. It allows the FBI and researchers to extract deeper analysis from crime statistics. For example, FBI data in 2021 showed that approximately 80% of homicides nationwide were committed with a firearm. That kind of data point wouldn't have been possible under the previous system.