IT WAS A DAY to be proud of the uniform, a sunny August afternoon to honor the badge at the Jersey shore and remember those officers who made the greatest sacrifice. Two sources familiar with the Margate, N.J, Police Department say the 2010 Hero Thrill Show was also the day colorful Philadelphia lawyer and law-enforcement philanthropist Jimmy Binns, who likes to dress up in police uniforms, should have been arrested for illegally carrying a handgun. He wasn’t — the sources say — because he’s friends with the Margate chief.