Mentally ill people - a minority- can be violent/destructive when acting based on their hallucinations. They use their fauty/impaired logic to find motives and to justify whatever they are up to do, they sacrify logic and common sense to make what they are up to look reasonable (and they will find many good motives for what they are doing, even if the law states the contrary, I know it).
But most have conscience of what they are doing, see how they even justify their acts using ludicrious theories that they made up or even believe. If they are up to hurt random/people they surely also have some kind of personality disorder.
Let's suppose he concluded, using his impaired judgement, that the 5g was responsible for his cancer. Why putting a motor home full of explosive on a avenue? Would not be more reasonable tryng to sue them?
I'm curious about what kind of explosive he used, I'm no explosive expert, but I think it is ANFO.