Rajiv Gandhi was sworn in as Prime Minister after his mother's death and, when asked about the riots, said "when a big tree falls (Mrs. Gandhi's death), the earth shakes (occurrence of riots)" thus trying to justify communal strife. There are allegations that the Indian National Congress government at that time destroyed evidence and shielded the guilty. The "Asian Age" front-page story called the government actions "the Mother of all Cover-ups" There are allegations that the violence was led and often perpetrated by Indian National Congress activists and sympathisers during the riots. The government, then led by the Congress, was widely criticised for doing very little at the time, possibly acting as a conspirator. The conspiracy theory is supported by the fact that voting lists were used to identify Sikh families. Despite their communal conflict and riots record, the Indian National Congress claims to be a secular party. The persecution of the Serer people of Senegal, Gambia and Mauritania is multifaceted, and it includes both religious and ethnic elements. Religious and ethnic persecution of the Serer people dates back to the 11th century when King War Jabi usurped the throne of Tekrur (part of present-day Senegal) in 1030, and by 1035, introduced Sharia law and forced his subjects to submit to Islam. With the assistance of his son (Leb), their Almoravid allies and other African ethnic groups who have embraced Islam, the Muslim coalition army launched jihads against the Serer people of Tekrur who refused to abandon Serer religion in favour of Islam. The number of Serer deaths are unknown, but it triggered the exodus of the Serers of Tekrur to the south following their defeat, where they were granted asylum by the lamanes. Persecution of the Serer people continued from the medieval era to the 19th century, resulting in the Battle of Fandane-Thiouthioune. From the 20th to the 21st centuries, persecution of the Serers is less obvious, nevertheless, they are the object of scorn and prejudice. For almost 1000 years, the Dogon people, an ancient tribe of Mali had faced religious and ethnic persecution—through jihads by dominant Muslim communities. These jihadic expeditions were to forced the Dogon to abandon their traditional religious beliefs for Islam. Such jihads caused the Dogon to abandon their original villages and moved up to the cliffs of Bandiagara for better defense and to escape persecution—often building their dwellings in little nooks and crannies.