There are, and always have been, destructive pseudo-scientific notions linked to race and religion; these are the most widespread and damaging. Hopefully, educated people can succeed in shedding light into these areas of prejudice and ignorance, for as Voltaire once said: "Men will commit atrocities as long as they believe absurdities."
Bernard Sussman, "Exclusive Interview with Martin Gardner", Southwind (Miami-Dade Junior College), Vol. 3, No. 1 (Fall 1968)