A very very small fraction of blacks commit murder
But, most black males are killed by other black males.
I'm guessing you probably mean most black people that are murdered are murdered by black people, not that the cause of death of most black males is murder by other black males.
And, blacks seem to commit more crime per capita than any other race in the US, by what seems to be a much greater degree than their numbers by % of the US population.
That is true (I think). But the point is that, even so, the odds that a particular black person is a criminal or a murderer is very very low. So there's no need to be afraid of every black person you see. Just because the odds are higher than for other races, doesn't mean the rate is actually high enough to be worried about when you see a person. That's the point Colbert tries to make.
When I watch the local news, I mostly see black faces as those the cops are looking for for a crime, or have picked up for a crime, or are caught on crime cameras committing crimes.
Well, first of all, the local news doesn't report all crimes. But even if they did report all crime proportionally by race, and blacks do have a higher rate of committing crimes, again, the point is that the odds of any black person you see being a murderer is extremely low.
I just don't see that many Japanese folks as being a problem for the crimes in most cities I visit and watch the news.....