Congratulations Diego. You win the award for Most Spectacularly Irrelevant Use of a Cartoon Ever.
Judging someone's objective actions as being evil or wrong-headed is not "the pot calling the kettle black." It doesn't mean that the people who are complaining about Diego are also commiting evil or wrong-headed actions.
Many, many, MANY evils of our time arise from a superstitious, fearful and craven (mis)understanding of the concept "Don't judge." It is so bad that people will defend child molesters while attacking those they persecute, because they don't want to see the problem and admit to the existence of sin in their perfect little worlds; that is how twisted this false charity has become. Or in the case of some in the SSPX, they will attack sedes yet cut incredible amounts of slack for the anti-Popes.
What Jesus actually meant was that we should be aware that we are all sinners, and not condemn anyone else as if they are reprobates without hope of ever changing or attaining redemption. That may seem like it fits your cartoon but no, it doesn't, because certainly we can judge an ACTION as objectively good or evil. We just don't have final judgment over the soul; that belongs to God. We don't get to say "You're a bad person, you're condemned." We can say "You're doing the wrong thing," or "You're an enemy" ( while praying for said enemy ).
If we weren't meant to question any fellow Catholics, why does Christ talk about loving our enemies? Because he is most certainly talking about other Catholics, at least in part. We will all have enemies among the Catholics. Friends may become enemies; and enemies may become friends.
Asking for someone with little control over his mouth to be banned from the site is not calling your brother "raka." It is an act of charity, since this person most likely is committing sins of calumny and slander. At any rate he does nothing but gossip.
If people would just understand more about the various kinds of judgment, they would not be so easy to sucker for decade after decade. We are not asked to know the heart; but we are asked to be wise as serpents, and soft as doves.