This is part of it. At Spa Rosberg got loads of hate for crashing into Hamilton, but at COTA, Hamilton going into Rosberg is just dimissed as 'rubbing is racing'.
I like Hamilton and his aggressive style, but some of the moves he sticks on Rosberg are just brutal and he keeps doing it, because he gets away with it and Rosberg lets him.
This is why it would be so good to see Hamilton and Vettel in the same car. It's the mind games that would be most interesting, rather than the out and out racing.
Not likely to happen (unless they both go to McHonda)