That contains heavy criminal slang and visual idiomatics. One should be a specialist in criminal ideology to interpret all nuances.

"Kill traitors (those who was a criminal but agreed to take any position from authorities), snitches, those who steal from fellow criminals"

"МИР" literally "peace" is actually an acronym of «Меня исправит расстрел» = "only the death penalty execution will correct me".

This kind of tattoo in a soviet prison was like an obligation of the most implacable behavior.