the context was clearly talking about living people, and mainly people who try to judge others by bringing up their faults and punishing them for their faults. these words clearly dont refer to any dead people.
that is pretty much impossible to be true. For instance, even though he was God it's very obvious Jesus was playing the role of solely being human, while here. He referred to God as a superior and not himself at times. This also means when he harshly judged people calling them vipers etc, that's what he was fine with Christians doing to be Christlike. When he furthermore supported the death penalty and never once faulted the Romans for being ruthless with criminals (and btw the 'don't throw the first stone' passage was added in long after he died) he merely suggested Christians hesitate more before being harsh, not that they never be it. If you believe he genuinely wanted nobody to judge evil happening around the and those doing it at all, then good poeple could never be judge either. Very ridiculous suggestion, he didn't mean it that literally. By this logic, you couldn't say 'good boy' to a son of yours even as that's judging him.