The DataContext of the controls in the DataTemplate is not inherited from it's parent. So in your case, everything in the Templat will have a different DataContext than CustomItem and MyControl.
When I've written custom controls that use data templates, I've had to write code in my custom controls to bind the template to the model. If the first answer does not work for you, check this resource.
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.