Unless it’s in a general way, and based on behavior exhibited, I never attack or discredit anyone, because there is no way to actually know if somebody is anything other than wrong about something. In other words, I attack an argument, or a claim, not the person repeating it.
Explaining why somebody is wrong on the internet is not attacking the person, nor is pointing out their errors an attempt to discredit the person. In fact, based on what little I know of climate matters, due to the massive amount of controversy, and really bad information from all sides, it would be wrong to accuse somebody of deliberately repeating bad information. This would assume their intent, something that can’t actually be known, so claiming I know it is an error. It’s why these opinion based arguments, where people assume somebody is saying something for a reason other than being factual, are so absurd. It assumes intent, and since we can’t actually know that, it’s a fallacy to argue like that.