And the Scriptures state that one of the evidences of last times is folks casting doubt about the literal physical return of Christ.Against my better judgment, Robycop, I am going to answer your question, even though it will do no good. First your either/or question is pointless since you were given Biblical evidence - by me and others - and it didn't show up on your radar. So why write more?
In a nutshell, the core of your misunderstanding is that you think that a lack of visible evidences undermines our spiritual position. It doesn't. The Jews of the 1st century, also, kept looking for the Messiah who would accommodate to their worldly conceptions of Himself and His kingdom. Even the Disciples had to radically change their thinking in order to perceive Christ's message.
The "proof" you are looking for will never come.
Just like the earthly "messiah" the Jews were looking for never came.
Such is being heard more and more.
Doesn’t mean the Lord will return right away, just another “sign” the Scriptures indicate will happen.