Okay, small bites.
I claim this age lasts forever because the Bible does. Christ and the church are for the generations, forever and ever (Eph 3:21). To say otherwise is unbiblical.
Jesus died for the church. Do you think he died for something temporary?
First off, nowhere in that verse does it say that this current age we're in will last forever. It is God's glory that will last forever. Read it. It says "to Him be the glory in the church and in Christ Jesus to all generations forever and ever. Amen." The key point is God's glory,
throughout all ages, forever.
Your second comment makes no sense. What do you mean Jesus died for the church? Are you a Calvinist? Jesus died for ALL PEOPLE. (That does not mean that all will be
saved, obviously not all people accept the gift, many reject it. But everyone has the opportunity.)
"This is good and acceptable in the sight of God our Savior, who desires all men to be saved and to come to the acknowledge of the truth. For there is one God, and one mediator also between God and men, the man Christ Jesus, who gave Himself as a ransom for all, the testimony given at the proper time. " - 1 Timothy 2:3-6
Lastly, obviously we're not going to agree if we are on two entirely different pages about what age we are currently in. But since there is disagreement among Christians on the topic of "ages" and how the ages are divided, let us completely set aside that issue for now, and just use common sense.
Please answer these questions:
1. Has Jesus visibly arrived on the clouds on a white horse with power and great glory, with his heavenly armies,
in full view of everyone in the world (Rev. 1:7) after the stars have fallen from the sky? Yes or no?
2. Has Jesus sent His angels with a loud trumpet call to gather His people up, before the you-know-what hits the fan on a global scale? Yes or no?
3. Has God poured out His wrath in a real, literal event, in the final battle against evil, killing all the wicked still on the earth and binding satan for 1000 years? Yes or no?
As I said repeatedly on this thread, obviously we are still living in an evil world. The temporary world powers are corrupt, there is injustice, evil, perpetual war, no peace. The bible states that when Jesus returns to defeat evil in the final battle, He will set up His millennial reign on earth. That will be a time of PEACE and goodness, which is obviously not what we have now, we have just the opposite. That peace will exist among all creation, even the animals. ("The wolf will live with the lamb, the leopard will lie down with the goat, the calf and the lion and the yearling together; and a little child will lead them.") Do you see that now? Obviously not.
Granted, not all Christians agree on the topic of the millennial reign of Christ, but one thing that is absolutely undeniable (unless one is completely blind) is that this current age is NOT a time of peace, justice and goodness, evil is still at the helm, temporarily, but not forever. How you can deny these obvious things is beyond me.
If I wanted to, and if I had time, I could list 100 more reasons why your view is false. But I don't want to write a book here, so I hope you will answer the questions above.