MGK and Vanilla Ice? He's the type that'll take their girls? It sounds like you're making him out to be a white "Mr. Steal Your Girl" Trey Songz.
Eminem isn't the voice of white people IN GENERAL. Generally speaking, Eminem is the type of artist that whites detested, which added to his appeal. He was the antithesis of what was socially acceptable to whites which is why he also appealed to bullied misfits who were white. Those misfits, loners, and awkward white kids who didn't fit was who he was kind of a voice for. That's the type of white folk who would openly talk about killing their own mother, killing their girlfriend, talk at length about shrooms, and basically what Em spent much of the SSLP talking about. That's not the typical white person. It's the type of white person that would be shunned by their own people which would include wiggers, "poor white trash", the depressed white kid who'd likely shoot up a school, and generally a white person who didn't fit in with much of anybody.
I wouldn't underestimate Eminem's stronghold on wiggers, because a lot of them are possibly the ones who have Eminem as the GOAT. Not in their Top 10, but they have him at #1 even though they listen to other rap.
in other words, MGK doesnt fit the johny knoxville role that youre claiming he plays.
eminem was detested by middle-aged white america. hes the voice of young white america. big difference breh.