The phrase "to shoot the messenger" means blaming or punishing the person delivering bad news instead of addressing the actual problem. Full definition
So it is important to keep in mind: Don't shoot the messenger who is only doing her / his job. (realclimate.org)
Some market watchers and politicians are blaming the world's woes on the press and high - frequency trading, but they're just shooting the messenger. (canadianbusiness.com)
Obviously a case of PADI shooting the messenger as well as the author. (dive-the-world.com)