The devices addressed to Clinton and Obama were handled by Secret Service screening facilities. The device sent to CNN would have gone through their mail room.
Anybody with the intelligence to get the materials, construct the devices without blowing themselves up, and learn where to send the devices would know the things would not come anywhere near the Obamas, Clintons, or some person of significance at CNN. Those are potent reasons to doubt ideological hatred and consider terrorism or false-flag.
Unlike Progs, who are hastening to blame Trump, I'm satisfied with waiting to find out who did this and then discern their purposes.