Ok...but that implies these cops may be doing coke and meth on the job, since the article says that those drugs "commonly cause" it. Surely that's an even bigger problem than "excited delirium".
I think you've misunderstood, excited delirium is claimed to be present in the individual the cop is arresting, not in the police themselves. The reason they attempt to justify greater force is in order to protect themselves from someone in such a state. I'm not agreeing with this, just stating what they would say.
Have an upvote for your mature response. If more people were willing to own their mistakes instead of hiding or doubling down, the world would be a better place :-)