Seriously, honestly, with absolutely no deference to "PC" or whatever people call it, I don't care. He looks French or perhaps even (just!) Welsh to me. And given how hard this film is clearly trying to be strange and mystical, it doesn't surprise me at all. It's like Yul Brenner being cast as a Texan, or Omar Sharif being a Russian, except those are meant to be literally in the real world, so they make less sense.
And now we're onto this, nobody has filmed this story for at least a decade. Hardly anyone's thought about it. And now, here is a film about it. A film exists where one didn't - perhaps a weird version, but one that one first glance feels vaguely faithful to the story. I fail to see how that is an assault on Western culture - certainly less than Guy Ritchie making a crap version with cockney gangsters.