Bhagat Singh

"Apparently I have acted like a terrorist. But I am not a terrorist. I am a revolutionary who has got such definite ideas of a lengthy programme… Here I warn my readers to be careful while reading my words. They should not try to read between the lines. Let me announce with all the strength at my command that I am not a terrorist and I never was, except perhaps in the beginning of my revolutionary career. And I am convinced that we cannot gain anything through those methods."

And he  (Bharat Singh) went further:

"Terrorism is a confession that the Revolutionary mentality has not penetrated down to the masses. It is thus a confession of our failure… Its history is a history of failures in every land—in France, in Russia, in the Balkan countries, in Germany, in Spain, everywhere. It bears the germs of defeat within itself… It is aloof from the life of the masses and once installed on the throne runs the risk of being petrified into tyranny."

https://anarchyindia.wordpress.com/bhagat-singh/bhagat-singh-and-the-ghadar-movement/