Note to Bomber: You don't need a $6.00 Wal-Mart clock on a mail bomb

[xor]

43. It could be someone with some sort of mental health issues

You just need to go on youtube and search for "qanon" or pizzagate to find various degrees of insanity. Some of those people are clearly not based in any reality, and I could see someone like in that state of mind building some nonsensical device that looks like bomb thinking that it is a bomb. I've been around a few people with schizophrenia and that does't seem outside the realm of possibility to me. Could see their mental illness and the toxic environment created by Trump colliding to cause them to do this.

Another possibility I think might explain non-functional and almost parody-like nature is that it's just an uber level troll by sociopath who is cracking up over the fact his goofy "bombs" are getting so much attention. Which may or may not have other political motivates (terrorize democrats or whatever)

But we also live in Trumpian Times and the Trump cultists are really really stupid and awful people. I won't be surprised either if it turns out it was one of them thinking this was actually a good way for them to make a point and win political points.