My friend, Robert Blasingame, posts at his blog an interesting observation:
The chief priests, etc, who had Jesus arrested, tried, and executed, knew he had claimed that he would rise again, so much so that they posted guards at his tomb to prevent anyone from stealing the body so that they could claim he had arisen.
But then, when it actually happened, they had a first-hand account from those guards that angels, not humans, had opened the tomb, leading to the disappearance of Jesus' body. And still, despite the impeccable testimony, the chief priests refused to accept the obvious.
Talk about willful blindness.