The father of an American Christian, killed by a remote tribe on an isolated island he was looking to evangelise to, has criticised the "extreme Christianity" which pushed his child to a "not unexpected end".

Dr Patrick Chau has been speaking to the Guardian, months after John Allen Chau died near North Sentinel Island in the Indian Ocean.

Explaining that his son's missionary work had been a contentious issue before he died, he said: "John is gone because the Western ideology overpowered my [Confucian] influence."

"If you have [anything] positive to say about religion, l wish not to see or hear it."

He went on to speak about his difficulty with the Great Commission where Jesus instructed followers to spread the Good News to all nations.

John Chau wrote to his parents before his death: "You guys might think I'm crazy in all this, but I think it's worth it to declare Jesus to these people.

"Please do not be angry at them or at God if I get killed. Rather, please live your lives in obedience to whatever he has called you to and I'll see you again when you pass through the veil."

Chau's death has courted debate across the world with suggestions mission organisations should think twice before sending evangelists into dangerous areas.