Lenin objected to Russian workers fighting in WWI not because he was horrified by mass slaughter but because the wrong people were dying for the wrong reasons in that mass slaughter.
On the other hand, the Social Revolutionaries, who were the electoral victors in the 1918 Russian Constituent Assembly elections, maintained not one, but TWO terrorist cadres. Since 1900, the SRs claimed responsibility for more than 20,000 kills in terrorist and insurgent activities in the Russian Empire. The SRs were far more enthusiastic and violent terrorists than Lenin’s Bolsheviks.
But the voters of Russia — millions of them — plumped for the Social Revolutionaries. Seems that the good folks of Russia were less delicate than 21st-century Australians about the alleged evils of revolutionary terror.