Final answer:
There is no specific quote provided in the resources that confirms what Mahmoud says is worse than Aleppo in the book 'Refugee.' However, the book deals with the severe hardships faced by refugees when fleeing from situations of war and persecution.
Step-by-step explanation:
In the book Refugee, Mahmoud experiences various hardships both in his home country and while attempting to escape in search of safety. Considering the context provided, Mahmoud likely feels that all of the options listed (Damascus, the refugee camp, the journey to Europe, the Mediterranean Sea crossing) hold their own forms of peril and danger. There is, however, no direct quote from the book mentioned in the resource material that specifies which of these Mahmoud says is worse than Aleppo. The experiences of refugees like Mahmoud often involve facing difficult and dangerous conditions, such as attempting to cross the Mediterranean in overcrowded boats, living in massive refugee camps with limited resources, and enduring the stress of a long journey to find sanctuary in Europe.
Readers are encouraged to look directly into the book Refugee to find Mahmoud's specific view on which is worse than Aleppo, as the provided context stresses the general hardships faced by refugees but does not contain a quote from Mahmoud on this subject.