has anyone noticed there are a ton of sentences in all the lessons that seem really anti-government? i mean, i watched cidade de deus and tropa de elite 1 and 2 as well as heard stuff on npr, but what is the deal?
Sounds as if the app has an agenda
I'm pretty sure that "isn't" means (is not), so that's why I think your answer is not accepted.
I guess your sentence was not accepted because -even though it has the same meaning- there are some noticeable differences. "It is unsafe in our country" would be best translated to "Nosso país é inseguro". different verbs, different nouns, etc.
I'm not saying that you're wrong though, I get your point.
There being a lack of security doesn't make something unsafe. Maybe there is a lack of security precisely BECAUSE it is so safe. While it would be difficult for this sentence to be literally true, that doesn't mean that it can be translated as "it is unsafe in our country".