With the exception of some early Christian sects that were exterminated when the Fathers of the Church wormed their way to power and could start killing their competitors, Christianity, during the greater part of its history, enforced celibacy and homosexuality on a fairly large part of our race, including some of its most intelligent members, through the priesthood and monasticism, and broke up families and family property by prohibiting marriages between even fairly distant relatives. Islam, on the other hand, ordained polygyny and encouraged Moslems to fill their harems, and engender children by women of all different races; that is why the Arabic stock was diluted and liquidated so much more quickly than our own.
"The Descent of Islam", National Vanguard magazine (January-February 2003) - Religion