Israel is a colonial state, not a particularly imperialist one. Still horrible, but differently so. Their focus is more on ethnic cleansing than on enslaving people in other countries for mercantilist reasons.

The worst imperialism in the world right now is Russia's attempt to reconsitute its collapsed empire. The Ukrainian invasion is just one of many steps along that road: interference in the politics of Georgia and Moldova are others, as are the continued efforts to destabilise the Baltics, and to fund extremist groups in European countries and America such as MAGA, Fidesz, Reform, the FN and the Italian fascists.