Thankfully, we were never Indians as you trying histor Neither I was, nor my parents where. For my parents and elders, when it was time to decide, they rejected India.
I couldn't stop laughing for a whole day when I came to know about Pakistani text books teaching history, that Alexander attacked Pakistan and porus who was a great Pakistani fought against Alexander, and referring Indus valley civilization as Pakistan valley of civilization, and many more funny things
My grandparents were British Indian. And their grandparents were subjects under Dogra rule. And their grandparents were subjects under Sikh rule. And their grandparents were subjects under the Afghan rule. Notice one thing: they were only "Indians" when the British came.
So you accept your Indian ancestry, or do you still think your ancestors came from Arabia?
There are many other things Indians have contributed to the world
a) First humans to build a bridge on the ocean were Indians, india to srilanka and also first civil engineers( NAL & NEEL) who designed the bridge.
b) first to process zinc
c) first to mention atom bomb and its effects
d) first to mention flying planes
e) first to use elephants in war
f) first to invent dieting clothes
g) it was Indians who proposed big bang theory.
h) India is the first country who gave detailed study on sex through kamasuthra
I) Vedas were the first to mention horses and chariots
J) first to start using spices in food.
K) first to teach Marshall arts like kung fu by bodhi dharma.