In reactions to CEO's killing, some vent about an industry they despise

When UnitedHealthcare CEO Brian Thompson was gunned down on a Manhattan sidewalk Wednesday morning, the brazen killing rattled the health insurance giant and many in the business community. The 50- year-old Minnesotan was a husband, a father- and a friend, his colleagues have said. "I am pretty staggered by the public, online reaction," said Matthew Holt, a longtime…