To play devil's advocate, doesn't a state possess a greater obligation to it's own people than to those outside of it?
You (perhaps naïvely) expect your government to protect you from foreign threats. You don't expect (and probably don't want) your government to protect everyone, everywhere.
If putting out worldwide propaganda is expected to have a long-term effect of degredation of public discourse, I would expect my government to take this into account and temper their actions. In fact, whether or not it is known today to have this effect, I'd hope my government would analyse these things and take them into account when making policy.