Two things. First, this is irrelevant here. The is about geekdom, remember? And since Holocaust Remembrance Day in the media is yesterday, today and tomorrow, we don't need any more reminding. Second, the reason they didn't bomb the camps is that they knew full well that right in the middle of a life-and-death struggle, the Nazis were actually diverting who-know-how-many SS soldiers and their immense support systems…
Camps would be even better at holding soldiers if a few planes bombed them, and some millions of Jews/Poles/Russians/Gypsies/Ukrainians/Muslims/Homosexualists, and other "subhumans" would be free. Nazists would have to catch them again, make these camps defended better, fight with the people that were escaping, etc.
The more chaos on enemy teritory, the better for me, right?
They (England etc) just didn't believe raports about that camps, and anyway didn't cared that much about some Jews and Eastern Europeans. They showed the same in Jalta.