Not sure if I'm missing a significant portion of the article as a non-subscriber, but there seems to be no backlash nor explanation of why he deleted it.

From the article:

  UPDATE: Tom Anderson deleted his post and changed his Threads bio following thousands of negative comments about his work with SpaceX and Elon Musk. In addition to his existing bio section, he added: “update: no interest in politics.”

Ah, I was expecting much more elaboration considering the title.