Ray LaCroix has written a letter to AHA detailing his criticisms about US Nationals, the Tulsa venue, etc. You can read the full letter at https://arabianhorseworld.com/enough_is_enough/
He has invited people to comment and to co-sign the letter if you want. The instructions are on the page with the letter.
Facebook folks will also find a post and discussion at the Arabian Horse World page https://facebook.com/ArabianHorseWorld