What made Sir Syed Ahmad khan conclude that Hindus and Muslims could not work together anymore?

What made Sir Syed Ahmad khan conclude that Hindus and Muslims could not work together anymore?

سر سید احمد خان نے کس چیز سے یہ نتیجہ اخذ کیا کہ ہندو اور مسلمان اب ایک ساتھ نہیں چل سکتے؟
Explanation

Hindi Urdu controversy started in began in the 1860s and continued right up to Independence.