Race is involved, but it's not the entire issue.
Look at Okposo, he's half-black and you never hear the media rip him apart because he never gets in trouble. Iginla, Simmonds, Ward, Oduya. You never read articles questioning the character of any of these guys.
However if you do act up, like Kane, like Subban, and even like Ho-Sang, the way the hockey media criticizes you. There's a very funny show called The League on FX, and while they're talking about football, it's funny because they discuss what phrases the media uses to talk about players of different ethnicities:
So black head coaches like Tony Dungy are "class acts".
A white football player like Wes Welker is a "gym rat", "a real scrappy player".
A latino baseball player is a "firecracker".
So yes, there is still an undercurrent of racism, where a black player who "acts up" gets held to a different standard than a white player who "acts up". But hey, I can remember when fans threw bananas at Simmonds, so media double-standards isn't a good thing but it could be way worse.
Personally, Ho-Sang's attitude and cultural background make me hope he succeeds even more. If he hits his potential he'd bring in a diverse range of fans in Brooklyn, and even if the rest of the league hates him he'll still be our guy. If he wears #66 in the pros to piss off Lemieux I'm probably buying his jersey out of respect.