Some mums can appear to be 'rough' (none of mine was allowed to be!) but you just have to keep an eye on what's going on and if necessary step in. Is she actually injuring them because if she is, you'll have to have them off her, unless feeding and be right there to supervise that. I had one who was different with her second (and last!) litter - she hated them crawling around her head and was inclined to snap at them meaning I had to be right there most of the time until she wasn't needed to be right there with them all the time.
I never worked out why she was like that with them, and not with her first lot.
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.