Mahabuddhi: In his garden in L.A., Prabhupada met and talked cordially to some professors, and so in Philadelphia we brought an Indian professor to meet Prabhupada. Prabhupada blasted him. Prabhupada called him a cheater and practically annihilated him. Then the person left.
We were shocked because he was a big person on campus, but Prabhupada didn't care. As far as Prabhupada was concerned, that professor was cheating the students and mocking them. For those of us on the Library Party, our business was meeting professors, preaching, getting reviews of Srila Prabhupada's books, and making his books textbooks in libraries and colleges. After Prabhupada met with that professor, we learned that while our service was appreciated, we were in the enemy's camp.
The knowledge of many professors has been stolen by illusion, and their business is to make the teachings of Lord Krishna mythology. Our business was to engage them and to give the students a chance to examine Srila Prabhupada's books. In meeting with that professor, Prabhupada trained us not to be attracted to what certain professors were teaching. In a sense, we were disguised enemy agents in another camp.
Reference:Memories Anecdotes of a Modern Day Saint - Volume 2 by Siddhanta Dasa