No one nor event can "hasten" the second coming. Jesus Christ IS coming again some day, you will get no argument from me about that. But that day was chosen and chiseled in celestial stone before time itself was created, and nothing anyone can do or say will "hasten" it's arrival. No one knows when it will be, and Jesus said that no one can learn when it will be. If anyone predicts a date for Christ's return, that prediction itself is a guarantee that the predicted day will NOT be the day on which He returns.
I love my evangelical Christian brothers and sisters in Christ, but I wish they would stop jumping at every vague "sign" that they see or hear which in their minds indicates that the return of Jesus Christ to earth is only a few days, or weeks, or at most a few months, away. Jesus himself said that no man knows or will be allowed to learn the point in time at which He will return to earth to first destroy the armies of AntiChrist, and then to set up His global millennial Kingdom of perfect justice, peace, and plenty that he will rule over from His throne in Jerusalem.
I personally believe that the dearth of information in the New Testament concerning the time of His return is meant to persuade Christians to be ready to meet Him at any given moment without constantly searching for "signs" of His return. My current tagline is excerpted from the next to last verse in the New Testament. According to Dr. James Strong's Greek Dictionary, the Greek word in the original autograph that is translated "quickly" in most English versions of the Apocalypse can just as properly be translated "suddenly", or "by surprise". "Soon" doesn't normally refer to a 1900 year wait. Therefore if God the Father had intended for the Apostle John to say that His Son Jesus Christ would return "soon" instead of "suddenly" or "by surprise" when God the Holy Spirit dictated the book of the Revelation 19 centuries ago, Jesus would surely have returned long before now.
Preaching the Gospel to every nation would hasten the second coming.