Ajahns Brahm, Sumedho, Thanissaro Bhikkhu and others began as disciples of Thai Buddhism. However I do not believe that the student cannot rise past their school.
When I say I am against Thai Buddhism do I mean I am against Ajahn Chah. Do I seem so foolish ? When I say I am not a Theravadin anymore do I mean I am rejecting the Pali Canon ? When I say I am not a Theravadin anymore do I mean I will not like a meditation retreat with Ajahn Brahm or any Western Ajahns who are Theravadins ?
Perhaps Ajahn Sona has advocated eating meat. I am not against it though I am not myself a meat eater. I strictly believe in eight precepts but elsewhere I have defended the right of single, beginner Buddhists to watch pornography http://www.dhammawheel.com/viewtopic.php?f=16&t=18929
Can a Buddhist Bhikkhu not watch a few minutes of marvelous skating on ice in Olympics ? It breaks the 7th precept. Bhikkhus in India accept cash as alms (for personal use). But they have to travel and they need money for local conveyance. It breaks the 10th precept (hopefully I am counting the precepts correctly). These are not wrong. They are changes that came with time and no one will say it is a deviation from life of a renunciate.
However there is a difference between that and travelling business class.
And I see no reason why I have to justify or defend my words at all anymore. Venerable Dhammika has done a wonderful job by writing The Broken Buddha the link to which is provided above and also in the Forum sticky. Now if your case is, none are so deaf than those who will not hear, no one and nothing can help you hear.
Spending words to a certain extent to convince someone is worth it. Beyond it, I walk my way and you walk yours. Neither I nor those opposing me will back down from their position. So we agree to disagree.