No it's not. It doesn't follow anything through to a conclusion, it just berates people who attack strawmen, or who dismiss others' arguments out of hand, whether that dismissal is warranted or not.
Just taking the "I'm not racist but.." argument on that post: are you really saying that there is no other way to phrase your argument? It's guaranteed to cause a reaction in everybody with an opinion on the issue and it's somehow their fault for not giving your argument proper attention or missing a nuance somewhere?
And then you complain about bad rhetorical hygiene. State your case in a way that your audience can understand and engage with it, and you'll get a better response.