The time to stop judging is when you feel most like doing so, which is all the time for most humans. Judging doesn’t put someone else in a corner; it just puts you more firmly in your own. Do you see?
You make the separation from others for little more than inane reasons that reflect learning, beliefs, prejudices, and various other follies humans wrap themselves up in. All at the cost of the innate characteristic everyone possesses to love “life.” That is life, which is all-inclusive of everything and everyone regardless of how you see things, e.g., every cause or belief you hold that takes you from your innate nature to love, including yourself.
In simple terms, you cannot judge and love. Not wholly and purely. It’s not the age-old narrative that you are judged as you judge others. No, it’s that your love drains from you when you do. Oh, and don’t condescend either, with the infamous diatribe that “they (whomever you judge) aren’t at your level of spirituality, education, or maturity. That’s just a sneaky form of judgment as well. All that’s left, really is “don’t judge,” ever!