Anybody who has experienced trauma, either in their personal life, where some great pain or injustice has move the person to words, or in their community or race, can do it.

Blues, and it's often only ever seen as a 12 bar concept, black, and American, is identifiable with any folk culture I have heard.
And if you've got pain, baby,
Go right ahead, and let those tears a-fall.

John Mayall, Sonny Terry and Brownie McGee recorded a song way back called 'White boy lost in the blues'
'White' favourites (I only use the word white, because the distinction has already been made), include:

Van the Man - playing in Oslo today
Stephan Grossman
Peter Green
Freddie White (Who? - Irish acoustic player from Cork; famous enough on this side of the water)

A few others, but I haven't had my first cup of tea yet.
Can't function without that!!

B.