Original sentence: Ukrainian Holocaust is a term used by some historians to refer to the Holodomor, a 1933 famine and a major national catastrophe in Ukraine.While the catastrophic scale of that famine is well established in the mainstream historiography as well as the fact that the famine was caused by the policies of the government of the Soviet Union (see Holodomor for details), some historians tend to criticize the politicising of the issue as well as attempting to present a larger-scale tragedy of collectivization in the USSR as a purely Ukrainian national terror-famine, (see Famines in Russia and USSR)  thus exploiting it for political purposes
Edited sentence: Ukrainian Holocaust is a term used by some historians to refer to the Holodomor, a 1932–33 engineered famine and a major national catastrophe in Ukraine.While the catastrophic scale of that famine is well established in the mainstream historiography as well as the fact that the famine was caused by the deliberate policies of the government of the Soviet Union (see Holodomor for details), some historians tend to criticize the politicising of the issue as well as attempting to present a larger-scale tragedy of collectivization in the USSR as a purely Ukrainian national terror-famine, (see Famines in Russia and USSR)  thus exploiting it for political purposes