Sure bro. I'll stop thinking "Russia having a seat at Versailles would have changed history" because it would somehow not change history, and that's something you can objectively prove, lol.
I'll tell you what definitely wouldn't have happened though.
The repeated Bolshevik genocides of Jewish people.
I'll not comment on your apparent belief that Nazism was some fated historical inevitability, which sure seems like something a Nazi would believe and not a Marxist.