The ex-wife, the mother of the man's children, knows that her children are going to be hurt that they are being left out of spending quality time with their father, and that other children are getting the benefit of his attention and time on a special child-centered vacation. So the ex-wife is angry that her children will have their feelings hurt again. Sounds natural.
But anger won't help her children. Pity that the new wife can't understand or care about the other children's feelings.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.