Final answer:
Leonard's feelings of guilt are most likely due to survivor's guilt, a common experience among Holocaust survivors, given the massive loss of life and the arbitrary nature of survival in the face of the Holocaust's brutal genocidal policies.
Step-by-step explanation:
The most likely reason for Leonard's feelings of guilt is a psychological phenomenon known as survivor's guilt. This condition often affects individuals who have survived a traumatic event where others have perished, particularly if survival seemed random or undeserved. In the context of the Holocaust, survivors may have felt guilt for being alive when millions of others, including possibly their own family and friends, did not survive the genocide.
Leonard's survival, where he was singled out to work rather than immediately killed, would have starkly contrasted the fate of many others. The liquidation of the Warsaw Ghetto, the transfer of Jews to forced-labor camps, and the extermination of those in death camps all contribute to the complex feelings experienced by survivors. Despite Leonard's lack of control over the situation, the randomness of his survival and the incredible loss of life can lead to persistent and profound feelings of guilt.
Moreover, considering the millions of Jews and other minorities killed during the Holocaust, including in camps like Treblinka, survivor's guilt is exacerbated by the societal pressures to discuss resistance and survival rather than the pervasive reality of death and destruction. The fact that survivors like Leonard had to rebuild their lives, often without being able to mourn or discuss their experiences widely, contributed to the ongoing emotional burden they carried.