The context is RMS having this conversation on a mailing list belonging to the university where Minsky worked, on which there are people under the age of consent. It's a wildly inappropriate place to have the conversation. The reason RMS can't separate himself from the FSF is because he's synonymous with it. He could have built a different organisation over the past 30 years, but he didn't, and as a result everything he does will be interpreted in association with the FSF whether it should be or not.