Really, Judy?

I wonder if anyone questioned black face performances? If Judy was a product of the studio, I wonder if she ever felt wrong doing this? It was the 1930s, so there was some racial sympathy by this time. It also amazes me how many people don't know this about her. I always wondered why Swanee is perhaps more celebrated than Over the Rainbow, I think it's because she got her start in Minstrel long before she ever went over the rainbow.