What is the theme of this poem

Questioning nature and existence itself.

Explanation:

"The Tyger" is a poem by visionary English poet William Blake, and is often said to be the most widely anthologized poem in the English language. It consists entirely of questions about the nature of God and creation, particularly whether the same God that created vulnerable beings like the lamb could also have made the fearsome tiger.

recent news about two years ago indicates that a polish forestry student by chance unearthed at a depth of about 40cm (16 inches), during digging in a damp polish forest he found a 13-page manuscript into a thermos flask.

greek jew marcel nadjari was a aischwitz slave who witnessed how the nazi's built big death chambers and crematoriums and told how he was forced to escort fellow jews to the gas chambers. he accounts on this manuscript how the nazi's disguised this chambers to look like showers. also, he describes this place as a process of extermination from the chambers to the trains arriving to take the bodies.

what is the question ?