Satan's Strategy for Delaying Matthew 24:14?

Matthew 24:14 says, "The gospel of the kingdom will be preached in the whole world as a witness among all nations, and then the end will come."

Jerry Rankin'g recent post addresses what Satan's possible strategy may be to delay this promise:

Satan is doing everything in his power to keep that contingency from being fulfilled—to keep the gospel from being proclaimed as a witness among all peoples. He has worked through puppet governments to keep countries closed to a Christian witness. He has obscured the nature of the Great Commission task in terms of ethnic-linguistic people groups instead of just reaching geo-political countries on our map. He has persecuted the church and believers, thinking it would inhibit the advance of God’s kingdom. But none of these strategies are working.

The strategy that is working, however, is to convince Christians that missions is optional, to get churches to become self-centered, engrossed in its own programs and work to the neglect of taking the gospel to the lost. He is distorting the concept of a call to the task as applying to an elite few who go as missionaries rather than to the church as the people of God. He has eroded the spiritual vitality of God’s people and the faith that would enable them to carry out God’s mission.