prove he is an “Kremlin apparatchik” ..whatever that may be-
it doesn’t appear to be listed in his Wikipedia bio-which appears testifies to more credibility than most commentators
https://en.wikipedia.org/wiki/Douglas_Macgregor
He is a paid commentator for RT, the Russian-government's English language propaganda channel. He literally cashes checks from the Russian government. What more do you need?
Unsurprisingly, he has parroted the Russian government's official line on Ukraine and other matters, including repeatedly claiming that Ukraine was about to collapse - famously he said at the start of the war that Ukraine would collapse within 24 hours. It's sad to see a retired US military official support America's enemies for money but unfortunately there have been other such cases (although not many).