Alright, I will give my honest thoughts on this, this is just my perspective even if you might think it's insane, edgy, or immoral. Frankly, I think that there are situations where the killing of civilians is justifiable. I would like to thank OP for not using the word, "Innocents" because such a word is debatable just how innocent someone may be just because they're not actively physically fighting.

We live in a world where people can be violent without literal physical violence, a wealthy man can steal the surplus of a worker's labor and be supported by the State in doing so. A person, especially in these days, can incite racial hatred and violence just by using a desktop computer or writing a racist book, an article. Just because someone's a civilian doesn't necessarily make them innocent.

Revolutions, especially in the modern world, aren't fought just with weapons, but with thoughts, ideas, opinions. Changing the public perception of Communism can turn a group of freedom fighters into terrorists, it can turn a gang of racist thugs into defenders of liberty. It can turn civil rights abuses into lasting security. It would be foolish of a true revolutionary to ignore the psychological warfare aspect of Revolution.

Frankly, I am fine with killing civilians if they are harming the proletariat or the Revolution. If you are a racist, sexist, classist, etc. than that alone means you're fair game in my book, whether you're taking up arms or not. By the virtue of you being alive and spouting your bigotry, you are harming minorities, you are harming the working class, and you're not welcome in the world to come. You are supporting our enemies with your opinions that you spread, with the money you likely donate, and with your approval of the status quo.

I know that sounds harsh, but the fact is, you're either with us, against us, or you get out of the way entirely. If you're with us, you'll get in touch with us, you can be an informant, you can provide refuge for revolutionaries on the bounce, you can provide food, do your part. Heck, you could even become a revolutionary yourself if you're up for it.

If you're against us, you can consider yourself a walking corpse, you've made the wrong choice. You're fair game for us, expect no mercy. If you support conservatism, capitalism, fascism, etc. if you're snitching for the cops, or you are a cop, you better watch your step. You, your property, your everything is fair game. I'm sure you're cutting yourself on all this edge right now, but revolution is revolution, no successful revolution has ever been clean. I expect our enemies definitely won't show us an ounce of mercy, so we're returning the favor.

If you get out of the way entirely, you better beat feet fast. Take a hike, Mike, get out of the area entirely, move somewhere else because you're not welcome here. I suspect many of the second category will end up in this category if they don't end up ten feet underground first. I bet once Wall Street is turned into a smoking pyre it'll be like cockroaches in a kitchen when the lights turn on.

That's pretty much the gist of it. The system is built that only violent means can destroy it, therefore we need to be violent, and we need to be violent well. Because if we're not, then we'll lose, and we'll lose our chance. We live in an inherently violent system that oppresses millions, action is necessary, and action there will be.