Shao, the difference is that Ul'dah fought a war with Sil'dih hundreds of years ago. Ishgard betrayed the dragons a thousand years ago.

Garlemald eradicated Doma last year.

Ul'dah has moved past its warring phase, Ishgard is waking up to the truth. The Garleans? They just want to rule the world. Try reading the 2.1 questline with Yugiri a little more closely if you haven't noticed the details of what happened to Doma.