My "wrong-headed thinking" radar is picking up more bleeps from this than from the incriminating email:

• "There are people with vested interests" is basically unverifiable, she's basically assuming anybody who disagrees is a fundamentally racist mutant
• "People won't change their mind anyway, the discussion will be pointless" can be said of any controversial subject
• The comparison to creationists can also be used to tar any opponent, there should be some version of Godwin's law for that
• The argument that "one can always find a difference if one looks hard enough"
• "No study can ever “prove” that no difference between two groups exists" seems to be besides the point - the question isn't whether any difference exists, but whether this specific difference exists, something that can be proved or disproved by experiment. (Well, more exactly, the topic would be what the cause of the difference is)