Yes, "Jean de Morgon" is lying, parentsfortruth.
You are in a hall of mirrors. You cannot get out by analyzing your reflection in each one. You have to break them all. It is a Hegelian maze full of false heroes and villains. When you read a statement like that, analyze it, break it down, ask yourself "What is this statement trying to make me think?" You are being drawn into a counterfeit reality.
For instance, in the above statement by Jean de Morgon, there is the usual lie that Lefebvre was a great conservative and that SSPX has somehow fallen from his glorious height. The SSPX loves to mythologize Lefebvre. People have now unconsciously started to go along with this, so that now you will hear SSPXers lamenting about how they need to "get back" to Lefebvre's tough stance. Pretty soon there will be statues of him everywhere and you will need to kiss his feet before entering your SSPX third-order "church."
Actually Fellay and Lefebvre are two peas in a pod. They both have the same technique -- win peoples' trust by saying conservative things, and then shiv them in the back. Some people call this "wavering," but it is actually deliberate mind-control technique. They use it in the media and in the government as well, changing the truth day by day, keeping you unsteady. It is meant to demoralize you and make you feel helpless and eventually apathetic.
The difference between Vatican II and SSPX is like the difference between Democrats and Republicans. Is that extreme? Maybe only a wee bit.