What would happen if Israel repented of killing their Messiah?

Les teaches that if Israel would just repent of what they had done—having killed their Messiah—then everything would still come along as God had intended it. This is set in Acts chapter 5, where Peter and the eleven are on trial before the religious leaders. When those leaders heard the apostles' proclamation, they were cut to the heart, but instead of repenting, they sought to kill them. Gamaliel, a Pharisee and doctor of the law, advised caution. Les notes that religionists hate the truth and have only one way to deal with enemies: kill them. The book never uses the term religion in a good way.