I think that mindset is deeply mistaken, even though it may be understandable. If you
don't research it you will leave a void that the actual racists can fill with their pseudo-scientific babble, and if you don't do any actual research or have any arguments to counter them because it's all taboo then all you have are ... the racist's arguments, strengthened by a "they're covering it up!"
Everyone can tell the different between bona-fide research for scientific and historical purposes and eugenics. The dangers are strongly overstated: eugenics was used to justify existing racism, it didn't cause it.