The cornerstones of the ideology of Russian Neo-Nazis is anti-Semitism and anti-Americanism. They are better traced to the Black Hundreds far-right antisemitic organization of Russian Empire rather than Nazi Germany (even if they adopted a lot of Nazi symbolism).
As such, most of Neo-Nazi organizations in Russia are patriotic and imperialist. They believe that the USSR and/or Russian Empire were destroyed by the Jews.
They do not trace their origin towards German Nazi Party, and as such, do not claim to share exactly the same ideology.
The predominant opinion on WWII, I think, is "Hitler was doing good job in killing Jews, but he should unite with Russia against the West, but he mistakenly invaded Russia."
Notice that the Holocaust denial is not widespread in Russian Neo-Nazis, they mostly support the Holocaust, or use it to accuse the Jews of being evil ("look, everyone hates Jews, this cannot be for nothing") or claim Russians saved the Jews, perhaps they should not, as the Jews are not grateful enough.
The Neo-Nazis in Russia are mostly anti-American and Anti-Semitic. They think the Jews destroyed the USSR so to steal property.
I would add that in the Eastern European countries bordering Russia, such as Ukraine, Belarus, and the Baltics, there are many Neo-Nazis, but they have very different ideology compared to Russian Neo-Nazis. They are usually very anti-Russian, pro-Western, pro-American and less anti-Semitic.
Their ideology is mostly based around local pro-Nazi collaborationist units or organizations during WWII.
They often engage in denial that their local collaborationist units participated in Holocaust and other atrocities (it was all done by the Germans, you know, but we only fought for freedom against Stalinism) and/or claim it was a mistake, excess, exaggerated (by the Soviets), or because of the general cruelty of the war.
The Neo-Nazis in Ukraine are predominantly anti-Russian and pro-American.
The pro-Russian Nazis are usually more racist and anti-Muslim as well, at least demanding Muslims to be controlled, deported to native areas and giving preference to Russian culture, while pro-Western Nazis often consider local Muslims as "brothers who also suffered from Russian opression".
Regarding Russian history, the pro-Western Nazis usually do not differentiate between Russian Empire, the USSR and modern Russia, they hate all, but the most hated leaders are probably, Cathrine II for Russian Empire, Stalin for the USSR and Putin for modern Russia.
The pro-Russian Neo-Nazis are OK about Russian Empire, view the Revolution of 1917 as Judeo-Masonic conspiracy against Russian people, view Stalin in positive light for purging the government from Jews, and usually positive about post-Stalin USSR while hating some of its leaders such as Khrushchev and Gorbachev as traitors. They very much hate Yeltsin, but divided about Putin, with their attitude towards him gradually worsens with time.