I am trying to find a different piece of work of Lenin that talks about the role the masses in not commenting the national affairs of countries that their nation-state is in imperialist war with but I can’t find it.

Regardless any Global South radical knows this, whether through explicit radical theory or through culture, of not interfering in other people’s affairs especially when you lack the knowledge or ability to affect it.

But in the meanwhile I found this which I find perfect for this context in Opportunism, and the Collapse of the Second International:

Kautsky wants to represent the golden mean, and to reconcile the “two extremes” which “have nothing in common”! Today (sixteen months after the outbreak of war) he admits that the masses are revolutionary. Condemning in the same breath revolutionary action, which he calls “Abenteuer” “in den Strassen”[4] (p. 272), Kautsky wants to “reconcile” the revolutionary masses with the opportunist leaders, who have “nothing in common” with them—but on what basis ? On the basis of mere words! On the basis of “Left-wing” words of the “Left-wing” minority in the Reichtag! Let the minority, like Kautsky, condemn revolutionary action, calling it adventurism, but it must feed the masses with Left-wing words. Then there will be peace in the Party, unity with the Südekums, Legiens, Davids, and Monitors!