Did the sugar indistry have a role in the overthrow of the Hawaiian kingdom?

Yes.

Explanation:

The Hawaiian sugar plantations established their presence in mid  1800s. At that time, they're working alongside the Hawaiian kingdom and obtained permission from the rulers there to establish their business.

The plantation owners soon realized that they could earn more if they took control of the territory rather than having to pay tributes to the Kingdom.

Sanford Ballard Dole led the coup to overthrow Queen Liliuokalani because of this reason, and US government has established a milltuiary base in Hawaii by 1887.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).