I have been to the Holocaust Museum in Washington several times and I have visited a couple of the concentration camps in Germany. I think it's important that we make every effort to never forget, even if it makes us uncomfortable. When I started my current job, by the way, I had seven weeks of initial training, and on one of those days we had to go to the Holocaust museum.
On a side now, I attended a congregation for four years in Germany. Two of the Kusserow sisters were in my congregation (at least one of them is dead now). Remember the WT had a big article about them? Several times actually. And there is a display at the Holocaust museum that talks about JWs and the Kusserow family. I remember we went over to their house one day and they showed me the letter that Hitler himself had signed ordering the execution of one of their brothers. It was chilling (even though I can't read German) to see it.
What makes my blood boil is that we (collective we, meaning the world) vowed that we would never let these atrocities happen, and yet we (by this I mean America -- since I'm American) stood by and allowed a genocide to happen in Rwanda in 1994. I worked in Rwanda briefly and traveled there a number of times. Even though the genocide was 10 years ago, it's still shocking to go there. Everywhere I turned there were people missing limbs, and other's who had lost entire families, etc. There are a couple really well written books that discuss the genocide in Rwanda (one is ..."we regret to inform you that you and your family will be killed tomorrow") if anyone is interested.