I wrote sometime ago about the veneration that Americans had for their flag that bordered on fetishism. This contrasts with the liberties taken with the national anthem. While Americans jump to their feet, remove their hats, place their hands over their hearts, and do all manner of things to show respect, the singers of the anthem are allowed to take all manner of liberties with it.
At any public event, for example, you are never sure if you are going to get a jazz or blues or classic version. The variations that I have not heard so far consist of rock and disco, though maybe even that was done in the 70s. Has anyone ever heard a rap version? Are their some music modes that are considered inherently disrespectful and so are not even attempted for fear of causing outrage?
I can’t imagine that this freedom to interpret the anthem broadly always existed and I wonder when people in the US began allowing the anthem to be varied this way.
By contrast, whenever I hear the national anthem of other countries, they always seem to do it straight.
Update: In the comments Scott reminded me of Jimi Hendrix’s version at Woodstock in 1969. That counts as a rock version and was pretty wild.