It could still be just some angry person, on a bet even. Or any of a number of more 'esoteric' possibilities, Or, applying Occam's Razor perhaps, just more PTB antics. Trying to get sympathy somehow - reacting to the general awakening around the NWO. We will have to see what narrative around this develops. Whatever happens/happened, it generally gets distorted out of existence by 'the narrative'.
I think it's the "reaction" rather than the "action" which is more telling when it comes to STS. They don't understand how telling that is. I guess they expect to be taken at face value. As if!
Their reaction, especially when some person, or group of people goes against the powerful STS 'elites', is usually swift and backed up by evidence. Here? No, it seems to be furtive and then they've gone about destroying evidence. Which leads me to some guesses...
1. They were taken by surprise by some person or some thing and wanted to cover up the result because they didn't want to call attention to the object of destruction.
2. They did it to themselves and hoped no-one would notice. (both reactions to 1 and 2 - very quiet - only succeeded in calling attention to these things!).
3. They were attempting to do something else, equally weaselish and awful and a mistake happened. Whatever secret weapon they were using/test-firing either backfired or missfired and they are at a loss to know how to respond. It may have just occured to them that they have opposition that they weren't counting on and perhaps weren't even aware of.
I like option 3 the best.

But I realise that this is all speculation. There's also a lot of it around on alternative web sites... that's what makes the whole thing so interesting. Of course they could attempt to use the speculation to lead everyone 'up the garden path', too.