Sardar lunch!

Three Construction workers are working on the 20th floor of a tall building in Bombay. One is a Mallu, the second is a Bengali and the third is a Sardarji.
Every day all the three meet in the lunch hall and have their lunch together One fine day — the Mallu opened his lunch box and finds idlis in the box.
He says ” I am fed up of eating these idlis daily. If I find idlis in the box tommorow, I will jump from the 20th floor and die”.
Next the Bengali opens his lunch box and finds Fish in it and says ” If I find fish in my lunch box tommorow, I am going to jump from the 20th floor of this building and die “
Next the Sardarji opens his lunch box and finds Parathas in it and says ” Mother promise, if I find parathas in my box tommorow I am also going to jump from the 20th floor”
Next day the three friends meet in the lunch room for lunch. Mallu opens his lunch box and finds Idlis and promptly jumps from the 20th floor and dies.
The Bengali opens his lunch box and finds fish in it and jumps from the 20th floor and dies.
Sardarji opens his box and finds parathas and he also jumps from the 20th floor and dies.
In the combined funeral held for all the three friends by their colleagues, the Mallu’s widow says ” I did not know he hated idlis so much. If not I would have packed something else for his lunch “
The Bengali’s widow says ” I did not know he hated fish so much. If not I would have packed something else for his lunch”
The sardarji’s widow says ” I do not understand what went wrong. My husband always prepared his own lunch….!!!