"if you have any form of disease, you could do a particular group of people a favour and not visit a doctor"
This is the full quote, as seen in game.
Actually I did nothing near that,
As shown by the above you, in fact, DID do it.
I didn't tell him to commit such act nor encouraged it, I didn't even "discourage" him from living,
You do discourage him from living as telling him not to go to the doctor could be deadly depended on the disease.
as I said a particular group of people, meaning it's a minority.
False, it doens't have to mean the minority. It depends on the context.
You tried such slander in-game aswell and this doesn't even classify as a loophole,
Proof?
because it has a whole different meaning than telling someone to commit suicide.
May be true, but in the end, the results could end up being the same.
Overall
You shouldn't have said it and if I could I would've accepted the report.
An official won't be required but you would need to be spoken to about your actions, as you do need to understand that saying even such a thing could negatively impact some players. You're a Moderator to make the player experience better, not tell players stuff that may lead to their deaths IRL. It's just a game, chill.