I missed the apart about the Army being a bad influence. That is just mean, obviously he is having a rough time with it and criticizing the decision isn't nice.
I wouldn't necessarily say it was berating, but it was very judgemental. Even if it was/is rude to swear on your Facebook page, it is also rude to criticize people's behavior by being "etiquette police". If they really felt the need to comment on it, it should be about how it affects them and not about the behavior being wrong.