I think museums are not meant to be sacred spaces. The problem is in the presentation. I had a similar experience in a graveyard attached to a synagogue in Prague. During the tour, the guide made it clear that Hitler had planned that The Jewish Quarter of Prague was to be kept intact to be made into a museum of Jewish culture. Nazis then moved the entire population out to be exterminated in Theresienstadt, Flossenbürg and other concentration camps. Very few Jews returned to Prague.
The behaviour of the tourists from all over, was so offensive in their picture taking and such, I had to leave. If we want "the sacred" we must make it explicit for people who can't understand it on their own. I couldn't help wonder whether Hitler got what he wished for.