"Stupid is as stupid does, Forrest."
Why don't we think through the propaganda of letting the enemy make us look like ISIS whether it is real or not? Maybe because they are incapable of thinking ANYTHING through if it doesn't fit with their preconceptions. "4,000 Artifacts Stored at Oregon Refuge Held by Armed Group."
You know, they could have realized a disinformation danger ahead of time and publicly announced at the start they were posting guards on the artifacts, but that would have (1.) made too much sense; and (2.) been impossible given the clown circus personnel pool they had to draw from. Proper planning prevents piss poor performance. And these guys aren't exactly Dwight David Eisenhower before D-Day.