And even if God didn't call him for this people, no where in the Bible will you find man needing to ask for permission to reach a people for Christ. He was obeying the very first commandment to Adam that never changed: subdue the earth. He was living missional. That is what we are called to do, even if it means our lives.
He did his Father's will, and people are butt-hurt over it.
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.....
‘he very first commandment to Adam that never changed: subdue the earth. ‘
Uh, it would seem the locals subdued him in a pretty emphatic manner.