Yuval Harari is absolutely right and absolutely correct.
The aggressor is one and only: United States of America.
CIA has created a coup in Kiev, hoping to make Ukraine its puppet and by doing so get the access to Crimea and establish there a naval base. Imagine that, an American military base on a Black Sea, which is a home for the Russian Empire Navy for hundreds of years and Soviet Union's Navy for 70 years!!! There were no choices and no chances for Putin's response, in which he acted fast and decisively: screw US and screw ukraine.
Putin is the most intelligent and smart world leader today. If not Putin, the state of the world would have been in a very pity state today, with Ukraine becoming the only Fascist state in the world.