harmless, safe, nontoxic, innocent
I don't believe innocuous is a word that actually describes JWs, although that is how they present themselves to the world. They destroy families, self-esteem, and thinking ability. In the big scheme of things inside JW-land, they are pretty toxic.
The fact that these 4 dubs were stupid enough to attempt to gain converts in a country where religion is often used to fuel terrorist groups does not portray either innocence or safety. Whether they were sent as secret missionaries or they took it upon themselves to put themselves in a dangerous locale, there is nothing innocuous about their actions.
The person whacking a hornet's nest with a stick cannot blame the hornets when they attack.