Организаторы праздника с участием Деда Мороза из Великого Устюга были оштрафованы за дискриминацию государственного языка.
Yes - I heard about this.
Sometimes National Language Center goes too far - this was a pretty stupid decision...
Russians during this period did not treat Latvia any worse than it treated Russia itself.
The problem is with people like this one:
TV5: Krievu fašists par latviešu valodu - YouTube

Who still think that Latvian independence is some kind of historical error and want USSR and their privileges back.
she doesn't blame modern Russia or Russian people for things that happened 50 years ago.
I also do not blame them - except those who think that Stalin and what he did was right.