While there were many other factors, threats and violence definitely were key aspects to Hitler's rise to power. His use of terror tactics made people obedient through fear. After acting upon his threats, they knew if they didn't follow him, there was a good chance they would die. He used a sort of manipulation that while brutal, tends to be effective, as portrayed through many events and leaders in history, such as the French Revolution, Mao Zedong (China), Stalin (Russia), and Leopold II (Congo).
The Israelites had to listen to God and obey him while then God himself had to upkeep the promises. Both parties worked towards the goal but both God and the israelites had to keep their agreement