I recommend you pick up a copy of the following book before you foolishly label the Russians as the only ones responsible for the millions of dead:
"ÃÓËÀÃ. Ãëàâíîå óïðàâëåíèå ëàãåðåé. 1918–1960. Ñîñò. À.È.Êîêóðèí, Í.Â.Ïåòðîâ. Ì., 2000
Ñáîðíèê äîêóìåíòîâ, ñîñòàâëåííûé ïî õðîíèêàëüíî-òåìàòè÷åñêîìó ïðèíöèïó, äàåò ïðåäñòàâëåíèå î âîçíèêíîâåíèè è ðàçâèòèè â ÑÑÑÐ ðåïðåññèâíîé ñèñòåìû è åå öåíòðàëüíîãî àïïàðàòà – Ãëàâíîãî óïðàâëåíèÿ ëàãåðåé. Ïóáëèêóþòñÿ äîêóìåíòû ÂÖÈÊ, ÖÈÊ ÑÑÑÐ, ÑÍÊ – ÑÌ ÑÑÑÐ, ðåãëàìåíòèðóþùèå äåÿòåëüíîñòü ÈÒË, à òàêæå äîêóìåíòû ÎÃÏÓ – ÍÊÂÄ – ÌÂÄ è ÌÞ ÑÑÑÐ, îòðàæàþùèå îðãàíèçàöèîííóþ ñòðóêòóðó, ñòàòèñòè÷åñêèå äàííûå, ðåæèì è ïðîèçâîäñòâåííóþ äåÿòåëüíîñòü âñåõ èñïðàâèòåëüíî-òðóäîâûõ ó÷ðåæäåíèé ñòðàíû."
You'll see plenty of Ukrainians, Poles, Belarusians, Latvians, Russians, Lithuanians, Hungarians, Germans, Jews, Uzbeks, Tadjiks, Turkmen, Estonians, etc., as BOTH victim and criminal. Figure it out.
Since the Russian font isn't coming through - try looking for the publication here: www.idf.ru (GULag 1918 - 1960)
If you prefer English, pick up a copy of this:
A Century of Violence in Soviet Russia
by Alexander N. Yakovlev
He details the victims AND the perpretators. You'll find there were more Russian victims of the GULags than any other group.