Separate the sin from the sinner

"You're such an idiot"
"That guy was a total asshole"
"Don't go there - it sucks. The food is terrible"

Unless you're trying to emulate Jesus then there's no need to love the sinner, especially if you hate the sin. But judging the sinner can be just as harmful.  The sentences above are nothing but opinion dressed up as fact.  They are our judgment, which we are trying to enforce on others by making it a generalisation.

It may all be true: perhaps you are an idiot, that guy is an asshole, and the food is dreadful.  But by trying to factualise our opinion we close off other possibilities.  Maybe you're very clever in some areas, and we get frustrated with your inability to see our point of view in others. That guy - he might have had a terrible day so far, and was just doing what he had to do (it's easier to take out frustration on a person rather than a system: see traffic wardens). Is it possible that the food just wasn't to your taste?

Better phrasing might be:

"I think you're behaving like an idiot about the car"
"That guy came across to me as acting like a total asshole when he told me I couldn't park there"
"I really had a bad time there.  Didn't like the starters or main courses at all"

Like a lot of beneficial change, this is difficult and unwieldy at first.  Careful phrasing makes three changes: it separates the actor from the action, it introduces the truth that this is our viewpoint, and specifies the 'sin' for which we judge.

If you can start doing just one of these then your mental model will shift to accomodate your new language:

1. Distance the actor from action. Move from, "You're so rude" to "You're being rude"
2. Accept that this is only your opinion. To go from, "You're so rude", to "I think you're so rude".
3. Specify the problem. Not "You're so rude", but "You're so rude to me about my painting".

The more of these you can incorporate into your speech and thoughts, the better.  There are benefits for you:  it opens your mind to other possibilities, keeps you less judgmental, and focuses you on the issue. And in negotiation with another we can make a distinction between the person and the problem. Calling somebody an idiot is rarely helpful.  Telling someone you find their attitude to a specific issue is unwise allows more space into the discussion, and can help you resolve a problem.

Narrowing your speech will broaden your perspective.