it isn't so much a matter of race as character.  my father is a Sadist and i am not.  we are the same race.

i do think that Asians are on average less ethical than Europeans and Africans on average less intelligent and more impulsive ...

but i would rather hang out with an average African or Mongol than my father and it's not even close.

it's the same as any other trait.  some races are taller than others and yet there are Chinese Giants and Icelandic Midgets.

once you know you're dealing with a sadist though do not kid yourself and think there is any right approach that can be found in dealing with them.  

character trumps everything.

my sadist father ONLY smiles and laughs when he is hurting somebody or reminiscing how he hurt somebody.  he is visibly in pain whenever anybody is happy.  and he actually cried when i told him that he will soon not be able to hurt anybody anymore because he will have alienated everybody.

when i analyze people the first and last thing i ask myself is whether they enjoy the pain of others.