It's not the folks that stock up on guns and ammo, it's the crazies with enough to transport what they have in a old ford.
You can make fun of his 'arsenal' if you want but a federal employee (active duty Coast Guard Officer) with the intent (looks like he had intent, not just bragging on a gun forum) to cause harm to American citizens needs to be given a large dose of the meds he had. All at once.
Conducting your searches on a government (or even a company) computer and you don't expect to get found out?
Having the means to kill a few people isn't enough to warrant any action.
Being close to the people you would like to be removed from our government isn't enough.
Expressing a desire to actually do harm, having the means to do so, and close enough to get a few shots off is probably something you want to keep on the down low.
Unless you be stupid.
Asking for the means to kill almost everyone on earth? I wonder who he was asking and what was he asking for?
Quite a bit of harm has been done in this country with a 1000 rounds or less.
Was this guy outwardly less stable than the shooters our FBI Radar guys have missed in the past?
Was he preparing for the time they Come And Take Them?
I just can't fathom defending this fool. But, that's your right.
If the media is correct, I know what drove this guy CRAZY.
Hasson's neighborhood was 80% Latino and he lived in a cramped basement apartment in a small house in Langley Park. 
