It has nothing to do with wrongs making a right. The whole point of the over used liberal tactic of "the other person did it too" is to muddy the waters and give people who need an excuse not to say they are wrong or to ignore and/or reject the facts or not to concede they have lost the debate.
Just another play in the liberal's playbook designed to keep people uninformed, brainwashed and ready to condone at any cost wrong doing by Democrats. People who use this tactic are only interested in one thing and that is not to convince or sway reasoning people to their point of view but to manipulate, deceive and control the thinking of unreasoning, emotional dupes and people who are basically disinterested but will dismiss the facts and accept wrong because they're hearing everybody does it. And people susceptible to the "the other person did it too" argument propagate it themselves because in the back of their mind it is a rationale for them to do anything they want if they can "imagine" others are doing it.
"Imagine," a key word that is where "the other person did it too" argument gets to be used most, because if there isn't a real example of "the other person did it too" they make one up. The truth that maybe "the other person did it too" has nothing to do with their goal which is simply to make you believe "the other person did it too" so they imagine the other person did it too, they make it up just like making up that Rice and Powell did it too.
Yep, just one more example of the deceit and conniving embedded in the mental illness known as liberalism.