You wrote that no one with half a brain would buy the spin. Since I bought the spin, you are implying that I have less than half a brain. That is another way of

You wrote that no one with half a brain would buy the spin. Since I bought the spin, you are implying that I have less than half a brain. That is another way of saying I'm stupid. How is that not what you wrote? And your comment was not "directed at no one". You addressed quite a lot of people "people with half a brain", "people without half a brain", "people who bought the spin", "people who didn't buy the spin", and the author.