NEW YORK, Dec 12 (Reuters) - U.S. hate crime incidents dropped in 2021 from a two-decade high in 2020, according to FBI data released on Monday, but the agency acknowledged that the figures exclude totals from more than one-third of the country's law enforcement agencies. Overall, more than 7,200 hate crimes were reported in 2021, about 1,000 fewer than a year earlier. More than 60% of the reported incidents were based on race, ancestry or ethnicity, while about one in six were classified as sexual orientation-bias crimes and one in seven as religion-bias crimes. Fewer than 12,000 of the country's...