I run into this thought regularly. I don't know if it's something that I'm more sensitive to or I just have a very low tolerance for people but I have found myself "judging" people a lot recently and I don't like it that much. :-(
Here's what I think. I think it's okay to have an understanding of "what" people do and not agree with them, even think they are wrong. What isn't okay is judging someone to "be" a certain way because of something they have done.
I need to focus on letting people be who they are and let their actions be their actions.