First, god doesn't belong to any perticular land. he is universal so everybody has the right to follow him irrespective of caste and region.
Second, Most of the Hindus converted to Islam not forcefully as your history says. It were your ancestors who din't allowed lowercaste people to follow there religions and were termed OCCUT. Islam gave them the status of human beings and this is the region why there are so many converted muslims in India.
