They ask the question. Why? Why? My God, why? I have seen other worlds. Other spaces. I have walked with gods and wept with angels. But to my shame I have no answers.
He’s the only one who could know. Because he’s been here before. I wish I had not lived to see this once. I can’t imagine what it is to see this twice. I just can’t imagine.
I guess Spider-man is talking about Captain America having lived through Japan’s surprise attack on Pearl Harbor.