It boils down to he's saying that the suffering of any of the victims doesn't matter to him. Literally at all... More over there is a pretty deep undercurrent that that has been the attitude for a long time and that the suffering of others has been ignored for equally long.
If you want justification for removing the works of the artists then consider it a form of ill-gotten gains. Would that work of art have been made if they're crime had been revealed or convicted?