Well, the Feds are calling it an act of domestic terrorism. So they can wave Miranda. Good. It was a sweeping crime, and the intention took thought and planning.
When I hear, oh well the bombs were not capable of going off or doing harm, I don't think we have all that information, yet. And, it in no way lessens the intention.
Think of everyone in the path of the intended targets. We're talking thousands.
Trump's daughter in law opened a letter last year at her home, containing white powder. The fact that the powder was benign, the absolute intention to terrorize was not.
It's awful. And, no, in a country this size, and with our freedoms, there's no policing everyone. In a situation like this, and others, it's how people handle it.
Would be nice to turn down the heat in the USA. Stop demonizing. Pray no copy cat bombers.