I’m well aware of Dearborn. I’ve actually been there a few times and live about 45 minutes from there. I’ve been quite safe there despite being an infidel and despite its neighbor being Detroit.
You were lucky.
Dearborn, Michigan is in the 83% percentile rank in the state for Violent Crime. It is in the 75% percentile rank nationally. Lower numbers are better. In this case, 83% of cities in Michigan have crime rates equal to or lower than Dearborn, or said another way, 17% of cities in Michigan have crime rates higher than Dearborn.
http://www.homesurfer.com/crimereports/view/crime_report.cfm?state=MI&area=Dearborn