Agreed, those tweets were unnecessary. Both are coming across negatively. The Tour is over, you're going your separate ways, move on. You can debate this next July- by letting your riding do the talking.
I love it. It reminds me Hinault/Lemond. Or "Pumping Iron" or Ali-Frazier. This is a rivalry for history books. Trash-talk has its place.
If only Howard Cosell were still alive. Boy, I'm really dating myself!