There is a reason why you should not judge, and it has absolutely nothing to do with other people or whether it hurts them.
There is also a reason why you need to forgive, and it has absolutely nothing to do with whether other people are the ones being forgiven.
The reason is that these judgements that you THINK are being done by you to other people, are actually being done by you to YOURSELF.
And the unwillingness to forgive, which you THINK is to do with your unwillingness to forgive another person, or the need to forgive another person, because of what they seem to be doing, has absolutely nothing to do with that person. You are meant to forgive in such a manner as to realize that YOU are the one who needs forgiveness, because you've attacked yourself.
Judgements are nothing to do with other people, and trying to maintain a goal of 'must not judge anyone' is missing the point. You must not judge YOU.
And forgiveness has nothing to do with other people, so trying to maintain a goal of 'forgive everyone' is also missing the point. You must forgive YOURSELF.
The reason is, that ideas leave not their source, and your judgements do not leave your mind and go into someone else. Your attacks do not leave your mind and go into someone else. They are done TO YOU, BY YOU. Internally. It all takes place inside your own mind and never goes beyond that.
So the real benefit of you stopping judging someone else, isn't really to do with being kind to people or nicer to them or whatever.... what you don't realize is that as you judge, you are internally creating a separation in your own mind, are manifesting a split mind, are pitting one part of your mind against the other under the guise of 'projection', your own mind is now at war with itself, and this experience of conflict is what you need to heal. If you THINK you judge someone else, you automatically are judging yourself. They are not even really involved.
I saw this yesterday when I was tempted to judge someone and started to do so, and Jesus prompted me to stop, and I realized that it wasn't that he thought it was an issue of me judging that person, it was that by me judging 'them' I was actually creating conditions in my mind of conflict and upset and was CAUSING MYSELF to become angry. I needed to stop judging FOR MY OWN BENEFIT.
Similarly, forgiveness processes have nothing to do with other people. It begins SEEMING like it's to do with other people, because our mind is already in a split state and we think that the 'other' part of our own mind that we've split off and diassociated from is "not me" and therefore is "in them". You use them as like a mannequin to pin your dirty laundry on while you attack it, but the attacking and the receiving of the attack is going on entirely inside your mind, even if your mind seems to have inflated to 'include' that other person's body. So forgiveness is not to do with forgiving that person for what they do, it's to do with you coming to admit and realize that they've got NOTHING to do with your upset and that you are actually the one who has done something to yourself, and YOU need the forgiveness.