The Second Coming has come — if you have eyes to see and ears to hear.
The interesting thing about the Bible stories is that one must understand that each lesson refers to life on different levels.
The Second Coming, for instance. It refers to each of us on a daily basis. We go to sleep and are reborn anew each day.
It refers to our lifespan, in that we will have a Tribulation, Armageddon, a Second Coming, and a return to heaven.
It also refers to mankind as a whole. This civilization, this incarnation of man, will have it's Second Coming.
So.... it's not as important whether the Second Coming has 'happened' , as it is to what you do until it does, or while it happens.