Serious question about race?

I have always had an issue with black guys starrin me down. I am about 6'1 185 pounds(white), not intimidating at all, and dont carry myself in a coky way. I grew up in toronto and my dad is half black. You cant see it in me but I always seem to get that wanna be gangster comment from white ppl. I have my ears pierced but dont wear big diamonds or anything G'd up. But it seems black guys stare me down and look so mad at me always. I even tried growin my hair out to spike it up (preppy look) when I used to have a buzz cut. But still the same results, black guys starrin.Whats up wit this Shat.