If Korea had attacked us, they could expect us to be prejudiced against them.
Americans are generally able to sort out the difference between one man and one country as far as culpability.
Facts are stubborn things. The shooter was Korean. Omitting that from the news reports doesn’t change anything, neither will it bring back the dead or heal the wounded.
One news article from Asian journalists said they objected to the Korean shooter being referred to as Asian. Well, let me tell them something. If the race of the shooter is omitted from a news story these days, everyone assumes the perp is Caucasian. Think about it. And where is the fairness in that?
In the U.S. media, if the race is ommitted, the perp is nearly always black. You have it backwards.