On Wednesday, Mr Arestovych did not criticise the president personally but instead berated some Ukrainians for pursuing a black-and-white narrative that could hurt Ukraine in the long run.
“The Kremlin has spent 30 years looking for ways to oversimplify things. Now you did it for them,” said the presidential adviser who is a regular on the live broadcasts of exiled Russian media.
“Simplistic reactions cause complicated consequences.”
Schools across Ukraine have dropped the Russian language from their curriculum and the education ministry has also recommended removing Russian authors from literature classes.
Estonia, which has already stopped issuing visas for Russians, last week banned Russians with Estonian-issued Schengen visas from entering.
Latvia, another Baltic nation that saw a Soviet occupation, said on Tuesday that it will curtail issuing residence permits to Russian nationals, saying the permits will be renewed in “very rare, exceptional cases”.
Egils Levits, Latvia’s president, earlier this week insisted that issuing tourist visas for Russians to “relax peacefully in Europe” in the middle of the brutal invasion was not “politically and morally justifiable”.
Both Latvia and Estonia have been popular destinations for middle-class Russians to buy summer homes, with many later acquiring residence permits.