‘While freely conceding that the Soviet regime exhibits certain features which the humanitarian may be inclined to deplore, we must, I think, agree that a certain curtailment of the right to political opposition is an unavoidable concomitant of transitional periods, and that the rigors which the Russian people have been called upon to undergo have been amply justified in the sphere of concrete achievement.’
To which the proper response is the ungenerous and sarcastic, "yes, of course it is right to murder your opponents when it benefits you". Because to engage otherwise is to give the sophistry more legitimacy than it deserves.
That's not even a defense of the behavior, just an acknowledgement that people do bad things. You could say the same thing about any bad behavior, up to and including mass murder. Welcome to Earth, where people do such things!
I’m explaining, not defending. As I already said, welcome to Earth, try to be outraged by the inevitable, only as appropriate.