The two sides are not equal, when valid criticism occurs. The other one fourth of the truth is that corrupters make no fine distinctions between necessary criticism and false judgments. Whoever is on the other side of the fence is attacked, and supposedly all is fair in war. In fact, as satan teaches sin, and a lot of persons take the lessons, it makes no difference what is thrown back at opponents. The more cowardly, the better.
Cowardice means maximum effectiveness to satan and crew.
If murder can be thrown back for criticism, then whatever works is the standard. If moral criticism is necessary, and a lot of it is, the critics would be well off if they were judged by the same standard as they criticize, which means morally honest rather than degrading and murderous. Nothing other than that would be properly representing the problem. So critics have to decide whether they are better off ignoring corruption or criticizing it. Victims of injustice and moral persons decide to criticize, because tolerating the sin is worse than coping with the consequences of criticism.