I cannot speak for Matthew, read his mind, etc., but the Church, at times, has actually "encouraged" racially mixed marriages -- say, when a pagan nation of a different race has just been converted and the mixture might prove beneficial to all involved. There is nothing wrong, in se, with such unions. In general, it is quite natural that such mixing has not been the norm throughout human history (indeed, like attracts like), even if at times it can serve a higher purpose (i.e., the spreading of the Faith). Frankly, most races never came across each other or lived in close proximity, at least not in large numbers, until relatively recently.
FWIW, the use of such things by the purveyors of the NWO (like Apple) is clearly NOT designed to promote any higher cause, but is, as stated by others, about creating a more or less mongrel race, devoid of all natural and supernatural ties to the ways of our fathers.