This is a popular viewpoint. The German theologian, Rudolf Bultmann removed all that was supernatural about the life and teaching of Jesus, and discounted passages written by believers. Hence, he was left with little over. His views caused a 25 year lull in the quest for the historical Jesus. We seek sound, historical evidence of the life, teachings, death and resurrection of Jesus.
All historians have a personal bias.
Modern historians look at Jesus through tinted spectacles and colour Him with their own values. Second, to interpret within the bounds of New Testament teaching that evidence. That Jesus died is a fact to be sought by historical research. We will interpret within the Christian framework. Others also interpret from within their own frame work, sometimes Jewish, Marxist, atheist, humanist and so on.