Moving his ox so it won’t get gored.
Those of us who have carried on debates on highly charged subjects here on FR have pretty much seen it all.
The “you are an idiot compared to me” tactic is played all the time, and easily recognizable. Usually the poster wants you to respond by claiming you are ‘smarter’, or ‘know it all’ so they then can try to prove to you how they have this one niche of expertize which should cause us all to go prostrate at their feet.
They come here (FR) to ‘teach’, not to ‘learn’. And that is their loss.