Earlier quoted context omitted.
He's right about the whataboutism though.
he is right, but raising whataboutism isn't an argument. It's absolutely valid to point out immoral doings of the very people who are doing the accusations. Otherwise, it's a race to make the accusations and the first one wins - everyone else is whataboutism. You can easily see who came up with the inane whatboutism - the one who did a whole lot of crimes in the past, and wants to judge others now for similar crimes.
What has this parent done that makes them ineligible to criticize others?