Judgmentalism assumes that you have the right to change someone else. Well, you don’t. You only have the right to choose how you will change and behave. 
(Vince Poscente, motivational speaker)

We do think we have the right to judge others, don’t we? At least, we do it a lot. In reality, the only person we should judge is ourselves, choosing how we should behave and not being concerned so much about the behavior of others.

Do not judge, and you will not be judged. Do not condemn, and you will not be condemned. Forgive, and you will be forgiven. (Luke 6:37)