Probably is not true that there is any significant difference in the intelligence of the races, and the small difference that turns up in studies now and then probably disappears in the rounding.
There is a very probable error in the nature of testing, when testing , there is a real advantage to the test taker who thinks alike to the test writer, this makes the ease of communication within a culture vs the difficulty of communication across culture an advantage worth a few points for every taker.
If someone states an obvious truth , that is stupid?
If Democrats think that their party will have a lock on elections with a browner electorate , are they not trying to hurry the change along?
I think Democrats are in for a shock , you are not required to vote against our self interest , even if you are brown.