These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
First Installment Wins: Dawn and Day weren't quite as well-received, though they're still critically respected.
Nightmare Fuel: Besides being about, you know, the holocaust, the fact that these are real experiences make it worse. Namely, in the first chapter, it's mentioned that the Nazis use Jewish babies for target practice.
The death pits. The line of prisoners that had just arrived at Birkenau is going towards the pit, ever so slowly. Elie and his father are just about to walk into the pit, with Elie saying that he would have died for sure, but the line bends away at the last second.
There's also that kid who fought his dad to death for a bit of bread. Doubles as absolute Tear Jerker.
Some Anvils Need to Be Dropped: Elie, in his writings and in speeches, makes it very clear that indifference is an atrocity that can only lead to other atrocities.
"Like the leader of the camp, he loved children. As soon as we arrived, he had brought them bread, soup, and margarine. (Actually, this was not disinterested affection: there was a considerable traffic in children among homosexuals here, I learned later)" - Chapter Four