I talk about SS parades and monuments in Latvia. Supported and mandated by the government.
I follow developments in the Baltics somewhat, and I have never heard of this. I found a story on RT about a Latvian Waffen SS veterans' march, which was accompanied by an anti-fascist counter-demonstration. I could imagine that some Latvians view the SS as heroes even though Nazi Germany occupied Latvia, because the Nazis fought the Soviets, and the Soviet occupation that followed was much more brutal than the Nazi occupation. I don't think the police or the government is taking sides here, even though RT (which is known for its propaganda stories) tries to spin it that way: in a democratic society, everyone has the right to assemble and express opinions, and one job of the police is guaranteeing that right – even if it means protecting someone paying tribute to Nazi history from an angry mob.
I talk about the discrimination of ethnic Russians who were refused the citizenship and were stripped of some rights there.
I understand some people of Russian ethnicity who moved or were moved to the Baltics during the Soviet occupation do not have a citizenship of the Baltic state that they reside in, among others because the Baltic states require a proficiency in the official state language – which is not Russian – and the state views those Russian-speakers as being citizens of the modern-day Russian federation. However, since these people have no Russian citizenship either, they are not citizens of any country. Living as a non-citizen can be difficult, but every day more and more ethnic Russian receive the citizenship through successful assimilation.
Lithuanian government pursuits the use of Soviet symbolic but does not do the same to the Nazi insignia. All of the above routinely ignored by the European Union.
I was not able to find a source, but I don't find this at all surprising. Displaying Nazi insignia is banned in Germany and Israel, because Germans and Jews suffered tremendously from Nazism. The people of the Baltics suffered tremendously from the Soviet occupation, so it is understandable that they in turn do not tolerate Soviet symbols.