For one thing he assumed that God would not accept the church as it is. That seems contrary to the gospel. The other thing I had trouble with was the way he interpreted scripture. Those who go looking for signs of the end will always find them. Paul found the signs of the end time in his day, Augustine in his and Luther was certain that Christ would return in his lifetime.
Scripture challenges people of faith to view the world with an historical vigilance.
We need to be looking for God's moving in history, but we look for God in order to understand not in order to predict. It is always helpful to understand the historical context of scripture. The year was A.D. 68. General Vespasian of the Roman Army had gathered 6000 heavily armed troops from Egypt and Syria. His orders were to take Jerusalem back from the Jews who had rebelled against Roman occupation.