Why Matthew Leaves the Crucifixion Detail Out?

Luke is going for vindication. He's trying to say, look, everybody from all these different walks of life could see who Jesus actually was and they got him for kind of allowed this criminal on the cross next to him. Matthew also seems very interested in emphasizing Jesus' abandonment. The case Matthew was trying to make is not advanced by saying that there was an insurrectionist and he thought Jesus was the Messiah.