As a member of the church that also served a mission in Russia, this all checks out. Putin's government and the Russian Orthodox church were incredibly brutal towards outside religions.
When I was in Omsk I listened to a man testify that the Russian Orthodox church was good because Father Oleg the local priest had a man killed because he was trying to collect a debt on a member of the church.
This is total bs. For one, it is always super fun to see how slavic-supremacist types get butthurt over being unable to do anything about religious holidays of other ethnicities.
And look, you've even ad-hoc'ed a dark unrelated anecdote. Pushing agenda much?
I've only heard about controversies regarding Jehovah's Witnesses, but that's the problem nonspecific to Russia.