I'm not so sure about that. True, causing offence as such may not have been the intent, but it would take a pretty insensitive person not to realise that examples 1, 3 and 4 are wildly stereotyping. (And 1, though not intentionally insulting to the writer, is clearly insulting to most *other* black people.)

2 and 5 are a bit different, perhaps - 2 might just be a slightly tactless way of making a reasonable point, and 5 might just be a statement of fact. (Or it might be something far more aggressive than that - it really could be either.)

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store