I am not the one carrying out the attack in this instance, I only lend some CPU cycles firearms to a coordinated attack.

Intent is the thing you are missing. You know the end result of your actions. That is why this action is illegal in civilised countries.

I think the gun analogy does not really work here: you cannot be held accountable for creating any part of a gun, in case of a murder.

It absolutely applies, but you are not making the gun are you? You are handing a working firearm with ammo to someone you know will do something illegal.
If I borrowed my friends firearm and said I’m going to the range, that is a normal thing. If I said I’m going to Bondi Beach with it, that is a cause for concern and why people get caught up in accessories charges.