Except that (and the point you don't seem able to grasp) while the race isn't a DIRECT influencer on them being criminal or high earner or whatever, the CULTURE and ATTITUDES that their RACE may be more likely to promote can be more of a direct causal factor in their behavior and outcomes.
Ok then, if we follow your reasoning then the crime rates in the countries they originate from should be astronomical shouldn't it?
Here's a per capita comparison
http://www.nationmaster.com/country-info/stats/Crime/Violent-crime/Murder-rate-per-million-people
Strangely, I don't see many Muslim countries at the top of the list. Even that hotbed of immigrant psychopaths Syria, had a murder rate of less than half of the US, Perhaps Syria should shut its borders to to the murders and criminals from the US?