Like I said, trying to get an explanation from somebody that doesn't have one is a bad idea. They will come up with one. Or two, or ten... But until they figure themselves out, you are the absolute last person that can directly help. You can engage and fight back. You can yell, spit, scratch, belittle, plead, etc. It won't matter. They go somewhere inside themselves that you can't get to. Unless and until they are ready to face the issues as an adult, they will listen to anyone but you. The more you understand that you care for him, and that the best you can do is be pleasant and distant, the better for all concerned.
He likely knows how you feel already. You don't need to tell him again. He knows you don't understand. He knows he doesn't understand. Telling him doesn't make it go any faster. And it is not about you most likely.
Knowing that you don't know, but are still there is enough. And a lot can happen between now and any court dates.
Find things for you to do. Things to distract and give you peace and happiness. Think of it as a vacation of sorts...
Peace, AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."