Hindu Civilization was comprehensively defeated by the vast Islamic civilization of that time. Islam was in the period of rapid expansion---sorry that your Hindu civilization came across....the result was obvious....it HAD to get slaughtered by Islam and it did. Islam expanded and spreaded throughout Indian subcontinent--and throughout the whole (known) world. Stop whining about it now. The was how it was suppose to happen.
Now coming to your day dream , Hindu civilization can never 'take revenge' from the Islamic civilization. There are couple of reasons. Islamic civilization is the only global civilization other than the Christian civilization. It is not homogenous mass. It is present all over the globe. From Morroco to Egypt. From Arabia to South Asia. From Iran up to central Asia and down to Turkey. From the Islands of Indonesia to Malaysia in East Asia. From Pakistan to the Western Part of China. Even in India itself , there are ~ 200 million Islamic followers. Compare this mammoth geographic spread of Islam to Hindu civilization .... Also , in order to advance towards mainland Islamic geographic heartland , Hindu civilization will have to cross the very first and relatively minor obstacle and that is .... Islamic republic of Pakistan .... You know and I know , Indian nation can never 'cut-through' Pakistan to enter central Asia or Afghanistan physically. Your hindu immigrants in the Middle-East aren't having any effect on the cultural outlook or demographics of Muslim lands (A thing which Muslim immigrants in christian heartland ARE having ..thanks to more freedom , rights and life-style of post-christian West) ......
So please forget about any revenge rhetoric. Stay where you are. Stay at peace with your neighbors to the West... THIS is the destiny of hindu civilization.
what an ideology of peace and tolerance. And then they whine about others having not quite bright opinion of themselves.