To tie this in with the theme of Lee Perry, I often wonder what his position was re Rastafari... My impression of it is that he wasn't a rasta but took what elements he liked from it and discarded the rest . IIRC his mother was into more African/voodoo type religion, which I think are a big influence on his mindset, and then if you look at his early pre-ark work, its often a bit kinky, as well spiritual, kind of getting on for a bit pagan! The Rasta era overlaps with the Black Ark days, and he was clearly down with the mystic side of things, but had his own increasingly out there ...searching for a word here...cosmology of it all... with influences from all religions and other ideas he came across...
...all of which i relate to, and i think is why he goes down well in europe (and the rest of the world), as its not a dogmatic religious position, more a freewheeling, mystic, high!, ever changing, personal 'philosophy' (if that's not too strong a word).
Its true with all religions, and maybe even more so with Rasta, that there's a whole spectrum of observance, maybe with Bobo Shanti at one extreme, and someone who quite likes and can identify with reggae and wants to see peace and love in the world at the other - certainly there are atheist Christians out there for whom Christianity means they just want to be nice people. (northern europe especially)
If you can have that kind of spectrum its no wonder that singers also take different positions, and some maybe aren't really feeling it wholeheartedly and that comes across, and others still are out and out fakers...