Chekist commanders were usually Russians of a special type, a group Solzhenitsyn later claimed were not really even Russian.
He even contested the notion there had been any “Russian” Revolution at all:
He said the revolution had been imposed on them from outsiders, who went on to kill 66 million Russians.
It was a Russian Revolution. Lenin controlled Central Russia and identified the Whites with foreign powers and the hated landowners, aristocrats and tsars. It’s understandable that some might want to downplay that, but that doesn’t change the history.