During the British rule, there was a province called Madras Province - Apart from Hyderabad, Cochin & trivancore, Mysore provinces. Madras province covered Many parts of today's AP except for Hyderabad province. This extended till Vizhag.
Madras province covered many parts of today's kerala except for Cochin& trivancore province. Similarly in today's karnataka southern parts except Mysore province and Mangalore province belonged to Madras province. So the Madras province had Tamil, Telugu, Kannada & Malayalam speaking citizens.
So people from North in general called the south Indian people as Madrasis in those period. It has not faded out till now even after the states were bifurcated Linguistically.
Because Madras was Landmark of South once upon a time. And if you don't believe me you can flashback your Memory.... The Famous SERIAL MALGUDI DAYS by RK Narayan. Me and My Family used to see this serial together in 1990's and I remember One City called MADRAS.
And Thats is why that city was famous among North Indians. And THEY STILL TODAY Stereotype them. ---------------- Here in Mumbai, Marathi people think Bihar and UP are same but then I ACCEPT their stereotypes until is sick and bad.
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.