Well, I don't exclude that trauma can be a contributing factor to certain illnesses. The problem here is making the kind of gross generalizations that Maté makes, such as that all CFS cases are due to trauma, that MS is caused by trauma etc...
Anyone with a shred of intellectual honesty (and experience with these conditions) knows that these multi factorial illnesses are in fact ... multi factorial! You can't just go around claiming there's "one true cause" that is valid for every one and you've got it all figured out. Anyone's BS-meter should already be at their melting temperature at that point.
I don't discard the idea that is proposed, there is some merit and evidence and it should probably be better investigated to see if it holds up. At the moment this is mostly speculation with some basis on rats studies... far from anything of substance.
Also, I would like to hear what are the practical solutions for dealing with trauma which allegedly should solve those related conditions. What is the success rate for these interventions? Last time I checked on psychotherapy for CFS/ME/SEID there was none.
There would be also pretty unsormountable ethical issues involved in this sort of studies as I don't see how anyone could propose a cancer or MS patient to avoid any treatment besides psychotherapy.
So, for the time being, I find it pretty disingenous to make such unwarranted claims on all sorts of chronic and degenerative illnesses in the face of zero evidence. Not to mention that psychotherapy is a darn expensive course of treatment, with a duration of months if not years...
Anyway, I wouldn't want to throw the baby (trauma as contributing factor) with the bathwater (Matè's video), but definetely this bathwater isn't worth keeping.
My 2c
p.s. = sorry If I may have sounded rude in my first comment. Was not my intention, though sarcasm can be perceived differently by different people.