Most of his comments in that thread are not flagged, nor even grayed. Most which are grayed or flagged are ones like this:
In response to "How exactly will you be 100% renewable during a cloudy and windless period with solar and wind?" he commented "Trolling is unwelcome here, thank you." Seems like a justified flagging to me; with no supporting argument that comment amounts to nothing more than a bare insult.
Not a justified flagging. It is trolling. People who make that argument about unreliability are at best dishonest. To make that argument either means you know next to nothing about renewable energies other than that wind and sun aren't consistent. Or you are purposefully lying.
It is a form of gaslighting. These kind of arguments have been discussed to death but "renewable energy isn't consistent" is either to understand than it is to refute. It takes pages of text to fully explain this and only a few words to repeat the allegation. Sprinkle in a few claims about nuclear power being the only alternative to global warning (with even less proof) and you can shout down anyone who disagrees.