Your translation of James is bad. Look at the NIV:
(James 1:2-4 NIV) Consider it pure joy, my brothers, whenever you face trials of many kinds, {3} because you know that the testing of your faith develops perseverance. {4} Perseverance must finish its work so that you may be mature and complete, not lacking anything.
The New American Standard translates the same word as "trials". The King James is 500 years old and the language has changed.
I don't believe that suffering brings us glory. I don't believe that God allowed Job to suffer to bring him glory and bless him more. I don't believe that's biblical. Nor is it part of a school of thought by theologians. I think Job suffered to bring God glory and to remove the sin of pride from Job's life.
You said this,
"The early Christians denied deliverance from their persecutions because they knew that it was the will of God."
It certainly isn't a common thing in scripture that people denied themselves deliverance from persecution. It's unusual enough that it's mentioned in Hebrews:
(Hebrews 11:35 NIV) Women received back their dead, raised to life again. Others were tortured and refused to be released, so that they might gain a better resurrection.
So who's this verse talking about?
Remember that I italised the word. I know it's not common in our days. But remember that John gladly endured the pain of been burned in oil. Also listen
Do you think these apostle will ever ask to be immune to sufferings?
Also picture it this way, Jesus could have called for delicerance from the hands of those who persecuted and crucified him but he knew that it easy God's will that he suffers. That's how the early church saw it and it produced a lot of martyres.
Also @barncat do you accept the doctrine of suffering?
This is not my translation. It's the NLT translation.
But I don't see how the word deviates from the original? The idea is the same and besides it doesn't falsify my blog. The primary doctrine is still clear. And that's that it's God's will that @barncat, if he being a Christian suffers.