Using existing data from the FBI's Uniform Crime Reporting (UCR) Program, time series analyses were conducted on hate crime data from 2001 around the terrorist attacks of September 11, 2001. A statistically significant increase in anti-Islamic hate crime occurred after 9/11, and anti-Islamic hate crime leveled off within 8 weeks of the occurrence. News stories reporting anti-Islamic hate crimes, stories reporting fear of such bias crime, and public calls for calm, tolerance, and/or reaction to anti-Islamic bias crime followed a similar pattern found within the official data. A city-by-city analysis found that UCR reported anti-Islamic hate crime was essentially non-existent in New York City and Washington, DC. It is suggested that public calls for calm and tolerance and in-group/out-group dynamics may have impacted anti-Islamic hate crime frequency, thus accounting for rises and reductions in this form of bias crime over time.