Without the US, Israel could not do what it is doing. Between that, Iraq, Afghanistan, Libya, Syria, and all the starvation and suffering resulting from illegal sanctions and blockades around the world, the US does far greater harm than any other country.
Russia then Israel. The US isn’t currently killing people en masse so starting with them seems more personal preference than objective decision.
Without the US, Israel could not do what it is doing. Between that, Iraq, Afghanistan, Libya, Syria, and all the starvation and suffering resulting from illegal sanctions and blockades around the world, the US does far greater harm than any other country.