It potentially could be, still a long shot in my opinion. That’s quite a lofty operation that would require a large enough group of people with the exact blend needed to be this technically smart, but completely operationally retarded, as well as extremely crazy. Those people exist I’m sure, but few and far in between, how exactly did they all find each other, and all happen to hate all the same people who almost all, aren’t even in power? Also, none of these bombs actually went off, so why didn’t they detonate them? You’d also have to have a visual of the target and the package in proximity, creeping in the bushes or sitting on the street in your car with binocs for potentially hours, looks pretty suspicious and would put these agents in considerable risk of getting caught either beforehand or after. Sure, many of these targets aren’t the types who pick up their own mail...but also, if you’re going through this much effort and considerable risk to fly all these people all over the country, and make those bombs, you should probably know beforehand if they are the types who’ll go to the front door or gate and pick them up themselves. Highly unlikely these were rigged for remote detonations.