We will disagree about this mans so called ‘calling’. One can ‘believe’ what they will but God does not ‘force’ the gospel message on anyone, which everything I’ve back-read about this event, including his journals, he was doing just that regarding this tribe. Further deceiving the authorities responsible for the safety of this tribe.
The lists of his actions before during and while approaching these people consistently evidences he was unwilling to wait on the Lord. Going forward into a blaze of arrows assured him of death...and he knew that . That’s more like a suicide mission for his cause.
So we shall disagree about his calling.....
"For whoever would save his life will lose it, but whoever loses his life for my sake and the gospel's will save it.
- Jesus Christ
(Mark 8:35; Matthew 10:39; Matthew 16:25; Luke 9:24)
The Creator of all things says he's good. I'd leave it in His hands even if we don't understand it.