I can offer many explanations. I can explain why Hitler invaded the Ukraine, why the terrorists destroyed the towers, why the Romans and Jewish leadership crucified Jesus.
The explanations? The same explanations for why everybody, I repeat, everybody does hurtful things, any hurful things, is fear (can cause pre-emtive strikes), and/or the belief that they have been wronged to the point that it justifies what they are doing.
Is it right? He!! no! But we are all narcisistic when we act out in these ways - and we are wrong. Some people just feel more hurt and therefore more justified to do hurtful things.
Courts and ex's don't seem to understand the pandoras box of human emotions that they are opening with unilateral no-fault divorce. And they certainly do not understand the gravity of what they are doing to the psyche of hundreds of thousands of male citizens of this country every year.
On the other hand, the family law courts do have metal detectors nowadays. I guess they are at least somewhat aware of the beast they have unleashed.
If you keep poking a docile bear in a cage, don't be surprised if it eventually tries to tear your arm off.
Humans can be quite dangerous. Don't antagonize them. They have the capacity to mentally justify almost any action when motivated - very dangerous.
These stories will continue to sprout up. I expect the frequency to increase before it gets better.