OK, I respect that, but I’m interested why (as an intellectual, not political, exercise)?
You in general like the Onion, so I assume it’s not a question of comic STYLE; it’s content.
The content here is certainly silly (gorilla ownership) as is the twisted logical premise (if everyone owned a gorilla, no one would be attacked by a gorilla). That’s the core of any Onion article—making something serious seem silly. And in general, humor is found in the unexpected connections we make between what is presented and what we are lead to anticipate.
We find something funny when (a) we are surprised by the turn of events and (b) we make the connection between the expected and the unexpected. The laugh reflex IMO is a self-congratulatory response to understanding.
Since I am pretty sure you understand the connections to be made here, may I assume it’s not funny (to you) because you’re not surprised?