Which best describes the author at this point in his life? he comprehends the situation but is trying to remain optimistic. he reveals the torment he feels while riding the train to the unknown. he is too young and naive to truly understand what is happening. he is troubled by how quickly the others have accepted the current condition.

I believe that the option that describes the author at this point in his life is that he is too young and naive to truly understand what is happening.
The author is sitting and thinking about the world he is living in - about the exile of Jews and how an important historic event that is. He still doesn't understand the horrors that it entails - he is not afraid, but rather curious as to what is going to happen next.

Alasdair MacIntyre is a Scottish born, British educated, moral and political philosopher who has worked in the United States since 1970.  His work in ethics and politics reaches across disciplines, drawing on sociology and philosophy of the social sciences as well as Greek and Latin classical literature.

MacIntyre began his career as a Marxist, but in the late 1950s, he started working to develop a Marxist ethics that could rationally justify the moral condemnation of Stalinism.  That project eventually led him to reject Marxism along with every other form of “modern liberal individualism” and to propose Aristotle’s ethics as a more effective way to renew moral agency and practical rationality through small-scale moral formation within communities.

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