My children have asked me why my WAW is "doing this to us."
Teach your kids not to be "victims". He isn't doing anything to "them". He's unhappy and trying to find his way.
She's unhappy and trying to find her way, AND creating a scenario where they will lose the family they know, have to move from the house and neighborhood they love, possibly have to leave the private schools they are attending, their expensive activities, etc. All of that may even be good for them in some ways, but they can't see that. They're children.
However, I will suggest that they GAL.
TH, I know you mean well, but I really don't believe you understand the impact of divorce on children. They ARE victims here. They have no choices. All I can do is help them to understand, forgive, and move on, but it will take years for that to happen and for most children it never completely happens.