Who cares if they support Russia. They are mostly Russian speaking and ethnic Russians. Why would I care if they want to be allied with Russia?Minority votes don't win or dictate policy. Most of those thirty were dissidents supporting Russia.
How was the Ukraine President overthrown in 2014? They didn’t have the votes. They drove him out with violence. An actual insurrection and coup. So apparently the minority can dictate policy.
The eastern part of the country did not buy into it, and called the coup illegal as well as the puppet regime installed by the US. But you want to kill them for not bowing down to the puppet regime installed by the US State Department.