Taking a chance here: Skip the federal crime/idiot dad perpective - what if he was so disconsolate that he only hoped to join his son in heaven - using a marine van? He was IN the van on fire - I don't think he planned to survive. I only hope the marines were not badly injured saving him.
Can we separate the various issues here? That would make for a better discussion.
Regarding the loss of the son: yes, that is unspeakably tragic, and I sympathize with the gentleman. No one will hear any flippant comments from me in this regard.
Regarding the burning of the van: this action is irresponsible (I am judging the ACTION, not the PERSON).
Can a person hold both of these views at the same time? I believe so.