I see the above from a very different perspective...
At China, the incident was between the two Ferrari drivers, after Vettel left a big door open for Kvyat to accept cleanly (he did not touch another car through that corner as far as I'm aware).
At Russia, yes I think Kvyat messed up at turn 2.
But the second collision between Vettel and Kvyat was mostly Vettel's doing from what I understand, around the long left-hander, when he randomly decided to lift off the throttle through a full throttle corner when he had a Redbull right on his tail!