These are your words:
Since "recently-trained experts" is plural and since you directly included Marc as "you" in the sentence, there are at least two other people whom you deem as "recently-trained experts". Would you care to specify just whom you meant? That way, we would know for sure just whom you are demeaning. I would doubt that there are many people who would view your words as something other than a demeaning remark. If that's not what you meant, then please let us know exactly what you meant when you called people "recently-trained experts".
Lets not forget the constant reference to "hey..just tell us what you learned....ya know on the old Neijia list we sorted out all the BS artists pretty quick..."
Again..show me where this is aimed at his people?
How does it further discussion?
It is meant to close it and shut people up.