So, of the five principals (The Prime Minister, The Deputy Prime Minister, The Army Commander, The Police Commander, and the King) who are the most pro-American? Who are the most rabidly anti-American? If they're all about the same, why should I care what they do out in the middle of nowhere? Does Thailand export anything we need?
The PM, the one getting tossed out, is the most pro-American.
But this coup has nothing to do with being pro or anti American, it's Thai internal politics and power struggle.
Friendship since WWII count for anything with you? They are a long term ally.
"Does Thailand export anything we need?"
Yes. A relatively inexpensive vacation with four-star hotels for $90/night.