Like if you said, "Asians suck at math" most people wouldn't be offended because it's not true. But if you said "black people have lower iq's on average" people get offended.
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No not really since the root of "black people have low IQ is derived from the aged old claims by the racialists that black people have low IQ in which used by the supremacist to justify the bogus science of human divided into 5 races" that has been thourougly debunked.
People are just offended by stupidity in general especially stupid claims from the 19th century0