I don't think "drinking the Kool-Aid" means what you think it means
The substance of the article says that attackers are using nasty but effective and optimised attacks. "Drinking the Kool-Aid" means going along with a bad idea from peer pressure or blindly following the company line / recieved wisdom. That's not what's happening here. In fact that's nearly the opposite of what's happening here since the criminals are changing their attacks to make them more effective.