This situation in no way warranted a SWAT response. There was no imminent threat.The only description I've heard is from the linked article "Eyewitnesses reported that the FBI team approached the victim’s home and attempted entry. Initially, they tried to gain access through the door using a battering ram. Unsuccessful in that attempt, they subsequently utilized a vehicle-mounted ram to enter via the front window." So while it doesn't say whether or not they first tried to knock on the door and see if he would come out peacefully, it does sound like they took some time trying to get into the house, so it doesn't seem likely that he was startled out of bed right as they were entering.
Again, not all the facts are out, and when the full facts do come out, yes, the FBI could definitely turn out to be partly to blame in this one.
All I'm saying is that if I had to guess right now, given this guy's social media history, is it really too surprising to think that he might have know full well that the FBI were the ones trying to get in his house, and in response decided to lock his door and wait for them with a rifle aimed and ready?
I stand by what I said about no-knock raids. They should be deemed unconstitutional. LEO creating a situation of reasonable fear of death or great bodily harm using such tactics are the ones who unreasonably and (IMHO) unlawfully escalate a situation to a use-of-deadly-force situation. People subjected to such tactics should have all constitutional protections, such as Castle doctrine, to defend themselves in their home.
A guy bloviating on Facebook, absent more, does not constitute a credible, imminent threat to anyone. Creating a situation in which use of force, and especially use of deadly force, is introduced was absolutely unnecessary.