They practice christianity and hinduism which was a strict way of controlling people in order to find peace and the true anwers from god.
(2) their former emperors stood trial for war crimes
The assassination of Austrian Archduke Franz Ferdinand on 28 June 1914 set off a chain of events that led to war in early August 1914.
He does not just happen to attend; he was the first one to receive a personal invite from Gatsby's butler. After that, he begins to form a friendship with Gatsby and goes to his parties regularly. Hope that helps :/
