OK, I finished the rambling video and have decided that the reviewer is a buffoon and drama queen. If his main concern is the safety of those allergic to nickel wire, it would have been sufficient to let KP know that they had mislabeled some wire (which to me could be an honest mistake, and appears to be a one-time anomaly) and let people know that they should not use any KP kanthal wire without contacting the seller. We know it's "BAAAAAAD", and the rep on the phone was courteous and agreed on every point.
What more do you want from them?
I worked a large part of my career in quality assurance and there are many reasons that this could have happened, none of which are deliberately deceitful or intentional. I have done many root-cause analyses when things went sideways and the process allowed something defective to pass. If the process is broken, that's easy to identify and fix, but sometimes the inspector is "broken". Maybe it's as simple as the employee doing the "magnetic testing" that day was lazy and didn't bother to test. Maybe the order was hot and the employee took shortcuts. Maybe the employee was hung over or wasn't paying attention - distracted by a personal crisis outside of work. Who knows? It happens.
But to feign this degree of "I'm so mad about being lied to, and you know who I am" is preposterous - he's assuming the absolute worst when it could just be an honest mistake. I would have simply identified the bad wire, called KP and asked them what they were going to do about it, then spread the word that folks with allergies shouldn't use any KP kanthal wire, and/or how to contact KP about replacement wire - you know, like any other normal, sane recall effort.