Unfortunately, your brief relays to how how things really are and how things always have been.
They'll continue not to recognize the illusions that they've created for themselves.
This 20% that's spoken of is little more than a fallacy.
Too late to contradict, as the orthodox seed was planted ages ago - repeated loud and often enough.
That would be Khmer [Surin/Sisaket/Buriram], less Lao.
You might want to get your social geopolitics correct before you go off speaking of things you're not knowledgeable about.
....and these somewhat modern nationalist ideals have been embedded ever since. Instigated by Pridi, Phibun and their militarist mob.
Though, one could easily argue that this Thaification was well in place by the turn of last century.
Semantics.
These nationalist "black groups" have been active for quite some time.....going back as far as the Thanarat and Kittikachom era and most prominent during the '70s and '90s uprisings.
Indeed.
I believe if one looked into it, you'll find that the overwhelming percentage of Thai teachers were churned out of the Rajabhat systems. There are numerous exceptions, of course.
Tells ya all ya need to know about today's crop of educators.