Look, I'm from the former Soviet Union. One of the reasons Putin, an alumnus of the KGB, the agency that committed some of the worst atrocities of the 20th century, came to power in 2000 and stayed is that people wanted unity rather than accountability. Chew on that.
NB: There were discussions after the fall of the Soviet Union to hold a tribunal, similar to the Nuremberg Trials, to hold members of the NKVD (as the KGB was previously known) to account for their crimes. There were also talk of lustration.
In the end, it was decided that, in the face of a massive economic crisis and a country that seemed to be splitting apart, it was better to turn the page and not pick the scabs of the country's historical trauma, not to dwell on the things that pitted Russian against Russian.
By 2000, nine years after the fall of the USSR, a KGB man was elected president. You might know him as Vladimir Putin.