It's called "whataboutism" in general. The word is used to easily wave away criticism of the other side of the argument without actually addressing it.
Complaining about whataboutism can be its own kind of whataboutism. I wish people I politically sympathize with would stop giving their enemies good points.
“But her emails!” / “but her laugh” / “but he wore a tan suit” for instance. All used to excuse high crimes and thefts of billions of dollars.