If you didn't willingly ignore the sins of "your side" that'd be valid.
Meanwhile, the only criticism you launch at the Mensheviks is... They wanted to keep fighting the imperial powers?
Don't get me wrong, it was just a bad decision, but it wasn't, ya know, genociding fellow socialists.
I'd personally criticize them for thinking they needed to follow the traditional Marxist thought that economic liberalism was a required stage on the path to socialism.