This was an interview, not a debate. Lemon’s job is to ask questions, period. You might take issue with his line of questioning, or his argumentative tone, and that’s fine, but the questions he posed, were related to the controversial and often incendiary comments Musk has made, and it was pretty obvious Musk, either didn’t have an answer for, or did not want to discuss.
Hence his little temper tantrum, towards the end of the interview.