That is certainly not true. Those who see nothing wrong in the slow and ugly torture of an animal see nothing wrong in treating an enemy soldier the same way, if not worse. In fact, the "Rape of NanKing" demonstrates the level of atrocity that has been perpetrated upon innocent men, women and children. The Khamer Rouge, Pol Pot, and associated regimes have similar records of brutality.
The inhuman treatment of POWs by Asians is well documented as well, and will never be forgotten.
You sound kind of like a racist. Just because some POWs were mistreated by some Asian soldiers doesn't mean it was ASIANS as a whole who did things wrong. Also just because Jews were slaughtered by evil SS guards doesn't mean the German people is an evil people. Just because some GIs killed innocent people in My Lai, Vietman doesn't mean the American people is a blood-thirsty people.