If a suspect is holding a weapon and does not comply with commands, (IE: does anything other than what they are told) then deadly force would be permissible and expected. It wouldn't matter if the suspect were legally armed or not.
I understand what you are saying. I’m saying that the post in question was apparently written by someone too unstable to make that judgement call.
Case here just last week. A domestic at the supermarket led to the cops being called. The woman waved the cop off and they drove away. Cop followed them until they stopped to argue some more. Guy went for a gun to shoot the cop and possible the woman and 3 young kids in the back. Woman wrestled with the man for the gun. Cop tried the tazer but failed to control the guy. The cop fired one shot and the guy was dead.
Heck of a Christmas memory for those three kids but he didnt have much choice.