Good question, and the Bible has the answer. First off, the Bible tells us when the end times begin; 2,520 years after the fall of Jerusalem. That is in 1914.
In Scribd.com, see; 1914 -- A Significant Year in Bible Prophecy
Then, in the Bible, we find this;
2 Timothy 3:1 But know this, that in the last days critical times hard to deal with will be here. 2Â*For men will be lovers of themselves, lovers of money, self-assuming, haughty, blasphemers, disobedient to parents, unthankful, disloyal, 3Â*having no natural affection, not open to any agreement, slanderers, without self-control, fierce, without love of goodness, 4Â*betrayers, headstrong, puffed up [with pride], lovers of pleasures rather than lovers of God, 5Â*having a form of godly devotion but proving false to its power; and from these turn away. 6Â*For from these arise those men who slyly work their way into households and lead as their captives weak women loaded down with sins, led by various desires, 7Â*always learning and yet never able to come to an accurate knowledge of truth.
If you read the above closely, you will see our time spelled out quite well. I think that the verse 5 explains most of the reasons; having a form of godly devotion but proving false to its power;