I don't personally think bitcoin can be 'killed' ... and if you read closely, I noted this. The title was a suggestion from the editors...

But ANYTHING can be disrupted, distracted, and divided. I don't think I need to point to any evidence for that to be obvious. This slows what would otherwise be a stronger adoption and it creates cracks and fissures which can be exploited even further.

This has nothing to do with fighting in the conventional warfare sense (since you mention al Qaeda, SEALs, or Green Berets). This is unconventional warfare where psychology takes psychology has a centerpiece.

Not "everyone" thinks they can kill bitcoin. I certainly don't. But I do know its possible to divide and weaken.