I think the first line may have been in jest, regardless, the rest of the points are valid I believe. They are exclaiming in horror at the attitide conveyed by the article, that showing off with these subs and terrorizing NK with them is good and we should be proud of it. I also see this as pretty barbaric behaviour. That sub has enough nukes on it to probably turn to glass every population centre in NK. Isn’t that terrifying?
NK poses no real harm, they are desperately trying to catch up with their military, probably because they are surrounded by American weapons. The only thing that NK has been taught by the international community is that you have to have nukes and be a bully to be successful. Following the example of the US. I’m not sure whether or not that poster is from Russia has much to do with what they wrote, and for the record, I found it perfectly legible.