Why Did Hyman Roth Want to Kill Michael in ‘The Godfather: Part II’?

Hyman and Michael’s father, Vito Corleone, were longtime business affiliates. When Hyman and Vito joined forces to take on Las Vegas, they agreed at the time to allow Hyman and his associate, Moe Green, to control the operations there. However, when Michael took over the family, he wasn’t obligated to keep any of Vito’s commitments, so he set his eyes on Vegas.

Source: https://www.distractify.com/p/why-did-hyman-roth-want-to-kill-michael