The cruelest act is no act.
The cruelest judgement is no judgement.

Deciding to be non-judgemental is an excuse to escape from acting to help oneself and others.

Instead, use your power of judgement to determine what is right and wrong and seek to bolster in oneself and others what is right and to overcome that which is wrong.

Loving is the act of doing, judging tells you how to act next.