You asked this question (in the title) in the other thread, but made no reply to the answers given. If you really want to engage Francis Collins then I suggest you read his book. What he has to say is in that book. I read the book and gave my own commentary here. It doesn’t follow that he is interested in the questions you asked. I was interested so I gave my answers in the other thread.
I can address your additional questions in this OP as well.
You cannot presume that Francis Collins believes that human beings are born as sinners. The Bible does not say any such thing and so large portions of Christianity do not buy into that theology of men either. I certainly do not. We are sinners because of the choices we make and what we do, not because we are born. That is only a lame attempt to avoid responsibility. It is the opposite of repentance.
AND the majority of Christianity certainly does not believe that babies are deserving of eternal punishment. That is a sick belief by a small minority. In fact, I think this is a belief we can attribute to the devil – something that the devil would teach. I feel that there are many who call themselves Xtian who have effectively become devil worshippers, because the descriptions of the god they worship sound so much more like a description of the “god of this world” than a description of Jesus.
By our own choice. It is we who are responsible and nobody else.
I think there are many who have deluded themselves that they can speak for Jesus who lie a lot.
And he could also say that he doesn’t know and your question does not interest him. What would you conclude from such an answer? Are you a Gnostic who believes in a gospel of salvation by knowledge – by knowing and believing in a set of dogmas? Jesus and Paul taught a different gospel, one of salvation by the grace of God.