RaysGirl, I haven't followed the whole thread, but a couple of later posts caught my eye. First, you can't go wrong with Italy. Everyone loves Italy.
But your concerns about Auschwitz may be valid. I've only been to two concentration camps, Auschwitz and Dachau, and I've been to each of them twice. Auschwitz is much more intense than Dachau. Although people were killed at Dachau, and the living condition were appalling, it was not a death camp. People were not sent to Dachau to be killed. Auschwitz, on the other hand, was a death camp. There was no other reason than extermination for people - including children and the elderly - to be sent there.
It's been many years since I was there, but the images are still seared into my brain. The exhibits are heart-rending and horrifying.
I'm not saying you shouldn't go; frankly, I think everyone should see it at least once. But if you are extraordinarily sensitive, you might want to forgo the experience.
By the way, skipping a sight is always an option on a Rick Steves tour. You can tell the guide you cannot or do not want to participate in an activity, and it's okay.