Earlier quoted context omitted.
This is a clear case of the "ad hominem" fallacy. You are saying his argument is wrong because of who he is. Just because he is doing something odd (holed up in Russia) doesn't mean he is wrong.
It's not so clear, in that this fallacy seems to be more accurately what's happening https://en.wikipedia.org/wiki/Tu_quoque
FTA "This specious reasoning is a special type of ad hominem attack."