Uighurs seek a passage to India

[sajan]

Any reason? Why India would welcome and should welcome?

India would welcome them because our culture is "Matru devo bhava, Pitru devo bhava, Acharya devo bhava, Atithi devo bhava" . Means One should worship Mother, Father, Teacher and Guests as God.
There are many legends of how the Parsis were allowed to settle in India. The priestly leaders were brought before the local ruler, Jadi or Jadhav Rana, who presented them with a vessel "brimful" of milk to signify that the surrounding lands could not possibly accommodate any more people. The Parsi head priest responded by slipping some sugar into the milk to signify how the strangers would enrich the local community without displacing them. They would dissolve into life like sugar dissolves in the milk, sweetening the society but not unsettling it. The Parsis have integrated themselves into Indian society while simultaneously maintaining their own distinct customs and traditions.
May be this open heartiness of Indians were very well used by The British to conquer India.