Referring to Prime Minister Narendra Modi, Noorani said "power goes to the head" of anyone who gets absolute majority in elections and accused him of indulging in "communal" politics.
His remarks came while responding to questions after a lecture on 'The trial of Bhagat Singh and his relevance today', held on the occasion of Bhagat Singh's martyrdom on the premises of Delhi Assembly.
The event was attended by Chief Minister Arvind Kejriwal, his deputy Manish Sisodia and other MLAs.
Recalling the times when former Prime Ministers India Gandhi and Rajiv Gandhi had got thumping victory in elections, Noorani, also an author, said "power also went to their heads".
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"All passed through my eyes. Whoever gets majority, power goes to their head," the 86-year-old Historian said, adding, "The Prime Minister, who has got absolute majority, is indulging in communal politics."
When Leader of Opposition in Delhi Assembly, Vijender Gupta, who was also present at the event, sought to know whether he did not have faith in people's mandate, Noorani said sometimes "people are mislead, but they should not be hated and instead they should be led."
During his lecture, Noorani also spoke on the life of Bhagat Singh and requested the Delhi government to publish his court proceeding.