The veteran politician, who was once a presidential aspirant and is now a permanent panelist on the revamped CNN show Crossfire, said Indian voters - estimated at 815 million - will remember the 2002 riots in Gujarat (in which mobs killed more than 1,000 people, mostly Muslims) when they go to vote.
"The BJP cannot tell Indians to forget 2002 because the Congress was - in many ways - responsible for the 1984 anti-Sikh riots that swept India. Modi must work hard to douse the anger of the Muslims with an element of hope.
He must make them believe him, he must address their fears of Modi's Hindu agenda," said Gingrich.