My take:

During different stages of my life, I have made quite a few friends from southern part of nepal... generally known as "Madhesi". Munna Kumar Shah, migrated to kathmandu as joined the same school as I did. He is one of the most hard working person I have seen. Basant Kumar Mandal from Rauthat one of the most honest and helpful friend I have. Shiva Narayan Das such a down to earth person despite being only son of super rich person.

I was very close to Mandal, during my college days. Sometime I used to call him "velay". he hated that. One day another fren from our class called him "velay" he picked up a fight and beat that guy. I asked him why did he do so??? He answered, "tailay kun niyat le bhanchas ra teslay kun niyat le bhanchha tyo farak chha"....... That day I learned a lesson,.... it was a deragotary term but he always excused me coz I was agood friend of him.... After that day, I never used that word.... 

Munna Sa, Shiv Narayn Das and Basant Kumar Mandal all are as Nepali as my friends Sashi Shrestha, Nishan Phuyal or Surendra Gajurel.

I had a cursh on a Bipana Sa (another madhesi) as a school boy.... she is still my best fren.....