Popa, I find myself in strong agreement. Its vital to love the person and hate the action. All too often we end up hating the person because of the bad action. It requires work to train ourself that when we see someone do something wrong to not brand the person.
What I personally do when I see someone do something wrong is, I think “he is a shogeg, he doesnt know the halacha, he hasnt had a chance to learn it yet, or he forgot, or it is one of his big nisayonos. I know Im not perfect and there are plenty of things that Im not yet doing correctly, I dont want someone looking down on me when I mess up and thinking that I dont know Halacha or thinking Im an oisvarf…, so I will give him the benefit of the doubt and understand that he is working on himself and he is doing the best he can.”