yeah this is a pretty crazy ass story. Hey you know what it made me think of? And I continued to think this more and more as more details came out.
Ya know how in horror/terror/sci-fi thriller movies (kind of like Terminator, actually) when some cyborg from the future or supernatural creatuer or something goes on a rampage and kills 20 people, the media and/or police always end up making up some crazy story about a mass murderer with weird motives and crazy fire power who was seemingly unstoppable? It's just funny, think about it... A guy walks into a home in a santa claus outfit, shoots up the place, douses the place in a home made flamethrower with racecar fuel as accelerant... it ignites and burns his arms, then he goes somewhere and shoots himself. It's even complete with a suicide so there's no evidence! Oh and it just so happened to melt the santa claus suit to his body, so, if the body looks funky in the morgue (like, I don't know, an alien! Or a demon santa from Mars! Or a Terminator!) it's just because of the plastic and nylon melted to his flesh

But it IS kinda weird. I mean who builds a home made jet fuel power washer just to burn down a house? You think maybe he wanted to spray everyone with it? That'd be pretty sadistic. Because to just burn the house down, a 5 gallon jug of gasoline in the trunk of your car after everyone is dead would get the job done a lot safer and easier.
Not to mention that assuming he got away and intended to remain anonymous (which was impossible, duh, because the family identifed him) but even if he could, why use something like... racecar fuel... which... is probably pretty easy to trace? I bet ONE guy in a 50 mile radius of that city placed an online order for racecar fuel in the last week

. Gasoline on the other hand, who doesn't buy that on a daily basis? Criminals are so stupid.