It was not BJP or Modi who created this mamoth victory, it was due to Sonia's campaign against hindutva, media's campaign against moditva, NGO's campaign against Modi via Godhra that created the factor (we can call it fear factor against these forces) which forced Hindus and other religion people of Gujrat to give Modi his third straight mandate.
It was a fair election and Modi has emerged as true leader of Gujrat.