I'm not at all sure that he thinks we should all think the same. I think his point is that there have been a lot of threads which have turned into flame wars, where FReepers call other FReepers nasty names. What good does any of that do? It turns some people off, and intimidates others to the point that they don't want to post their comments for fear of being called an ignorant snot, or some such.
There are a whole lot more civilized ways to get one's point across and to argue a side of a discussion without resorting to nastiness.