If you ask me, TLK could be interpreted as a thinly veiled representation of the Russian or French Revolutions. The Pride Landers are the nobility (upper class), the animals that live in the Pride Lands are the bourgeois (middle class), the hyenas are the working class and Scar is the one who was born into privileged life, a clear advantage over his hyena brethren, but chose to rebel against the system and seize power.
I wouldn't say that the hyenas are distinctive of minorities, but are the uneducated working class who are disadvantaged by the Pride Landers. Simba is that lion who returns everything to moderation. Of course, the movie isn't exactly point to point precise on the process of revolution, but I just caught the similarities. Point is, I've never really thought of the hyenas as black youth. I've always figured they were supposed to be a representation of the common working person. Take of that what you will, considering their behaviour and role.
Scar is a wily, sarcastic sort and that's expressed hand in hand with his body language and personality which in turn establishes his character. Yes, his mannerisms are eccentric at best but isn't everyone eccentric to some degree?







