I wondered about that. A group of priests and soldiers witnessed this, and none of them were moved by it. [...] Were they so driven that they dismissed something so incredible?
It's a good question. I think you put your finger on part of it there. Bear in mind that previously, the religious leaders and others who opposed him had claimed that any unexplained works he had done were because he "had a demon" - so even if they saw things that could be considered miraculous, they were so convinced that they were right and he was wrong that they probably attributed it to evil which had to be fought.
It's the same reason that I was always amazed that the Devil would continue to oppose God, despite knowing from long ago that his end would be in destruction. But sometimes becoming so fixated on your own actions can blind you to everything else, especially if you are eaten up with rage and/or hatred.
For those unsure, or who don't believe the whole 'spiritual' element, we know this happens in 'real' life too: some fugitives or criminals become so focused on what they want to do, that they become tunnel-visioned and ignore the massive odds stacked against them. Likewise with military leaders who will lead their forces into futile, suicidal campaigns because they are totally convinced of their own ideology and still believe they can win.