You can try to muddle the argument all you want, but
Dictionary definition of judgment:
a : a formal utterance of an authoritative opinion
b : an opinion so pronounced
You're NOT the authority of moral values. Just because you believe so, doesn't make it so.
Telling someone they're "sinning" *is* a judgment. You're parsing words and attempting to obscure.
I am no longer a christian, I left the religion because of how arrogant and judgmental most people are in it.
Can you find a way to provide support, love, and compassion without reminding them that *you* think they're a sinner? Can you?