I think that being judgmental is sometimes a healthy human characteristic. That's why our "spine tingles" in bad circumstances, as an immediate warning to get out of the situation. So, we do need some proper judgments made throughout our daily lives really.
The difficulty is when we let our menial judgments rule our behavior. {I've struggled with this for many years myself, so I do understand how disturbing this can be.

} Becoming self-aware is a big part of the task. From there, squelching the desire to speak your menial judgments ~ like the guy's shirt tails look goofy, or whatever. We can keep those thoughts to ourselves. It just takes regular practice. Exposing yourself to different types of people, with different problems, also helps open our minds as well.
You can do it!