One of his sons, also named Haran, had died in Terah's presence. I have seen such examples. Moses and the people of Israel stood trapped before the Red Sea, as Pharaoh and his bloodthirsty army was closing in. Israel was stymied in fear. It was something that they later forgot many times.
Religion is dead when it no longer has the power to send.
Religion is dead when it no longer inspires the faith to go. More often than not, those who went did not really want to go. Like Jonah who went to Nineveh, Daniel who went to Babylon, or Peter who went to the home of Cornelius, there was reluctance. Even our Lord went to the cross only because it was the Father's will. The best evidence that Jesus is our Lord is our own personal willingness to go, in spite of personal preference, in order to perform some aspect of His higher purpose.