Blocking a roadway is a far cry from looting trucks and setting them on fire and smashing store windows and stealing.
Can you point to video you are referring to that was watched with great interest that was not a Black protest? I can't think of any we've had the opportunity to watch in the US (there have been international incidents of violent unrest, frankly, we don't care much about those either) that have been looting of trucks, setting fires and smashing store windows and stealing.
So it's hard to compare whether people like to watch crime in action or not regardless of race. I'm just saying what that Black leader said, that the White population seems to get a perverse pleasure out of watching Black crime and looting.