You realize that the same Wikipedia that you cite contains all the information necessary to prove that you're lying and not very well?
Let's start with emperors and ministers:
So we have Khrushchev who was born in Russia, Brezhnev who was Russian, and Gorbachev who was Russian because of Russia's
patrilinear tradition. In Russia you're not "mixed ethnicity". You're what your
otchevstvo indicates which is that "Sergeyevich" part of Gorbachev's name.
But what's more importantly since Dzugashvili the political structures of the USSR were disproportionately controlled by ethnic Russians because Dzugashvili being Georgian himself understood that he had to have the backing of the largest group in the country if he wanted to stay in power through internal division.
Dzugashvily was an incompetent pranoid sociopath who couldn't rely on charisma or intelligence because he had neither. So instead he relied on terror and murder. It was his choice to at the same time push for forced collectivisation which caused Soviet economy to be structurally inefficient and at the same time push for nationalist rhetoric to use old prejudices within former Russian empire to retain control. He also promoted pseudoscience of Lysenko which really suggests that he may have been a Russian nazi, more than what he styled himself as. Also the cult of personality shows an obnoxious level of narcissism that is a typical trait of aggressive, insecure ugly midgets like Dzhugashvili or Beria or the rest of degenerates.
But why were there German collaborators in Ukraine? Nazis are
bad! Unlike Dzugashvili, Beria and NKVD. They were so
not bad that the party denounced them and established KGB in 1954 because a purge of NKVD/MGB wouldn't be enough to clean up the filth.
Now about Ukraine and Germany.
Let's start systemic repression of population under Dzugashvili's idiotic economic plans which resulted in a country-wide famine and the Holodomor in Ukraine specifically - because of Dzgugashvili's anti-Ukrainian stance.
Add to that regular terror by NKVD relatively few of whom were recruited from Ukrainian population because of cultural links of Ukraine to USSR's enemies - Poland and Germany/Austria. Ukrainians were repressed throughout the entirety of Dzugashvili's rule and
only under Khrushchev it changed. And not because Khrushchev was Ukrainian but because he simply wasn't a sadistic degenerate like Dzugashivili and had ambitions to improve his country, not just stay in power at all cost.
Then there's the distinction between territory of Ukrainian SSR and historical region of western Ukraine sometimes described as "Ukraine proper" which never was fully under Russian control until 1795, and with its westernmost parts not falling to Russia until Soviet invasion of Poland
in 1939. Instead it was heavily influenced by Polish and German culture because western Ukraine was under Austrian control from 1772 to 1918 - following the partitions of Poland-Lithuania of which it was part since
14th century - long before a Muscovite prince called himself the ruler of all Russians.
Austria was also the inspirator of the
Ukrainian national identity. Under Poland-Lithuania "Ukrainians" were referred to as "Rusyns" following the traditions of Kiyvan Rus and the Rurikid dynasty and Russians were called Muscovites which is historically correct.
Germany backed the creation of independent Ukrainian state in 1918 while Bolshevik Russia attempted to put it under its control by force. But before that happened they had to fight first the Ukrainian People's Republic under Petliura, then Germans, then Poles during the Polish-Bolshevik war. At the same time large parts of Ukraine war were under the control of Makhno's faction.
This is Ukrainian People's Republic at the time of Brest-Litovsk Treaty ending war between Germany and Russia:
Here's a Russian Imperial map of languages from 1914 (large file). Note the extent of "Ukrainian" indicating that Russian Empire recognized the differences.
Russian Empire treated Ukrainians the same way they treated Poles - and attempted to forcibly "Russify" them against their will. Ukrainians seem similar only because of their use of cyrilic alphabet and Orthodoxy. But saying that Ukrainians and Russians (Muscovites) are one people is like saying that Italians and Spaniards are one people because they use Romance language and Latin alphabet. Or that Czechs and Poles are one people.
In short the "actual victims of Soviets in Ukraine" from western Ukraine were simply people who never lived or accepted Russian rule and did not want to be part of a country that repressed and mass-murdered them. Soviet Union under Dzugashvili was a genocidal state with ethnic cleansing being part of policy to expand government control. People were forcibly re-settled by hundreds of thousands.
But even then they were mostly a minority because Hitler's Germany was founded on a racist ideology which viewed Ukrainians - even those friendly to Germany - as racially inferior and unwanted. They first treated them as all Slavs and only turned to Ukrainian volunteers when they began to lose and those volunteers weren't helping Germany as much as attempting to prevent Russian takeover.
Among those volunteers there were also Russians because opposition to USSR, especially under Dzugashvili never ended despite the terror.
These traditions of Russian nazis live to this day, and you can find them among Russian forces in Ukraine. In fact there are many more neo-nazis fighting for Russia than there are "nazis" fighting for Ukraine. Ukrainian "nazis" are mostly extreme nationalists using nazi symbolism rarely and mostly as provocation. They have their own relatively niche ideology that is more a type of Slavic ethnic chauvinism than German racist supremacism. They're similarly dumb but not identical. Russian neo-nazis are actual
nazis. They're not Slavic chauvinists but bizarre Russian German wannabes. And that absolutely takes the cake because what type of moron does it take to be a
nazi in
Russia. But for some reason there are so many of them. It's almost as if a sub-culture of angry idiots dissatisfied with their post-Soviet country took the most contrarian position imaginable. That of another group of angry idiots who wanted to conquer their country and
failed.
That's enough off-topic. Next time you try to write an edgy comment try to be smarter than a Russian nazi. Because that's what I call denying historical fact of crimes against humanity and saying "
only Nazi collaborators suffered under Soviets in Ukraine".