The inability to distinguish static/dynamic strong/weak isn't a minor mistake like fluffing up some grammar, it betrays serious ignorance of the subject material.
He's very opinionated and doesn't seem to know the subject material very well. He's just expressing his opinion slightly more loudly and eruditely than others.
I don't think he's confused about the distinction between them. There's one sentence in the beginning where he probably meant "dynamically typed" rather than "weakly typed", but for the rest of his post, his terms are chosen correctly. I'd rather give him the benefit of the doubt, than dismiss his opinion because of what might just have been a typo.
He's very opinionated and doesn't seem to know the subject material very well. He's just expressing his opinion slightly more loudly and eruditely than others.
I don't see the redeeming value here.